11. Ambassador City Jomtien, Pattaya, Thailand - 4,219 Rooms

This Thai resort is in a beautiful spot in the Jomtien Bay of Pattaya. The rooms are spread over five buildings, each with a view of the beach or the mountains. Inside its vast complex, you will find eight restaurants, several bars and nightclubs, a conference center, and a sports complex.

The massive Thai resort features oyster and cocktail bars, along with Chinese, Japanese, and Italian restaurants.

The hotel has one of the largest outdoor swimming pools in Asia, stretching until the sandy beach of the Gulf coast.

Ambassador's beachfront sports club has a funky outdoor skateboard park.

10. Luxor Las Vegas, Las Vegas, USA - 4,407 Rooms

Luxor needs to introduction. The landmark building of Vegas appeared on cinema screens more than Tom Hanks. The iconic pyramid shape hotel has the strongest light beam shooting to the sky from its peak, so you won't have trouble if you are trying to find your way back at night.

Fun fact; the light beam attracts so many moths and other species of insects that people think it's snowing in Vegas. It's quite the spectacle if you arrive by plane as well!

Luxor's postmodern architecture is based on the Great Pyramid of Giza. However, unlike in Egypt, it's cladded with glass instead of limestone. The 30-story building features the largest atrium in the world, with a volume of 29 million cubic feet (820,000 cubic meters).

Staying at Luxor in the heart of the Strip has its perks. For example, the hotel is connected by a monorail and walkways to the two adjacent casinos: Mandalay Bay and Excalibur. So you don't have to take an expensive Uber ride.

Various rumors are spreading that Luxor may be demolished to give way for new hotel complexes, but fingers are crossed that the iconic landmark that opened in 1993 is here to stay for a long time.

9. Mandalay Bay Resort and Casino, Las Vegas, USA - 4,426 Rooms

Located on the legendary Strip in Las Vegas, the Mandalay Bay Resort comes with a 12,000-seat sports and entertainment arena, a shark aquarium with 2,000 marine specimens, and a Michael Jackson show by the famous Cirque du Soleil group.

The resort was opened in 1999 on the former site of the Hacienda hotel-casino at a construction cost of $950 million. The 120 acres (49 hectares) Mandalay Bay has a tropical South Seas (the southern part of the Pacific Ocean).

So you can expect to see water indoors and outdoors. For example, the hotel's lobby features a two-story aquarium containing 12,600 gallons of water.

The Shark Reef is a 1,300,000 gallons (4,900,000 liters) aquarium with all kinds of marine life but dominantly inhabited by sharks. It's the largest aquarium on the Strip.

The main attraction is the shark tunnel, where you can observe the largest fish swimming right above your head.

The resort is home to the 11-acre waterpark called Mandalay Bay Beach. It has beach bars with snacks and cocktails, cabanas to chill, lazy rides on swim rings, a lounge in a lagoon, and a huge wave pool.

8. Barkhatnye Sezony Sportivny Kvartal, Sochi, Russia - 4,688 Rooms

Russia has built a massive complex of hotel buildings called the "Sports Quarter" by the sea in Adler for the 2014 Winter Olympics in Sochi.

The vacation town sits on the border with Abkhazia, about an hour's drive from Sochi, but close enough to the Sochi Autodrom and Olympic Park to reach by walking.

The Barkhatnye Sezony Resort is inside a 300-hectare park with subtropical plants and plenty of outdoor activities. The hotel complex resembles a Moscow suburb residential area rather than a high-end holiday resort.

Presumably, they wanted to make all the 4,688 rooms within the resort's buildings affordable. While they succeeded in this regard, you can see the cost savings inside and outside.

However, the sight of the beautiful surrounding mountains and the Black Sea coast beaches may compensate for the lack of quality. Plus, there is plenty of entertainment, from dolphin shows to high-speed roller coasters.

7. Wynn Las Vegas & Encore Resort, Las Vegas, USA - 4,748 Rooms

Wynn's massive complex was built on the place of the former Desert Inn, a small hotel in comparison, operating between 1950 and 2000. The low-key seven-story building was replaced by 45 floors and the sister property's 63-story tower.

Wynn and Encore Las Vegas jointly host 4,748 Rooms. The two resorts are connected via a shopping esplanade.

The Spa at Encore has a luxurious grand court for the guests. From here, you can access the relaxation areas, including the garden suites, saunas, hot tubs, and Polynesian-influenced body rituals.

Encore's Panoramic View suites are top-of-the-range with a breathtaking vista of the bustling life on the Strip. The spacious suites are located on floors 31 to 63.

High ceilings, floor-to-ceiling windows, and gorgeous chandeliers hanging from the top are some of the highlights.

Le Rêve Theater (French for "the dream") is one of the most spectacular shows in Vegas. The awe-inspiring spectacles combine fire, water, and acrobats in a way you have not yet witnessed.

It's an experience you cannot miss if you are in Las Vegas!

Meticulously selected greenery surrounds the sun-drenched area of Wynn's outdoor pool. You can have refreshing signature cocktails at its poolside lounge and celebrate your victories (or cry away your losses) at the casino.

- The biggest hotel in Europe -

6. Izmailovo Hotel, Moscow, Russia - 5,000 Rooms

The only European hotel in the top 11—and therefore the largest hotel in Europe—is located in the Russian capital, Moscow. With 5,000 rooms, the Izmailovo hotel from 1979 is in sixth place among the largest hotels in the world.

The rooms are spread across five buildings: Alfa, Beta, Vega, and a double building called Gamma-Delta. While the hotel complex officially has 5,000 rooms, Izmailovo claims to have "around 7,500."

Its impressive socialist classicist-style atrium is decorated by an enormous piece of art hanging from the ceiling.

Europe's biggest hotel is keen on entertaining its guests.

Fans of postcommunist interiors will love the tacky details around the indoor swimming pool.

5. The Londoner Macao, Macau, Macau - 6,000 Rooms

The $2 billion project was to redesign the former Sands Cotai Central resort in the theme of the English capital London. The entire facade was newly cladded, the suites were redecorated, and a Big Ben was placed in front of its entrance.

The Londoner has 6,000 guest rooms spread in five different hotels - The Londoner Hotel / Suites by David Beckham, Conrad, Londoner Court, Sheraton Grand Macao, and St. Regis.

The casino resort on the Cotai Strip has a total gaming space of 106,000 sq ft (9,800 m2).

The Londoner has 25 dining options. One of them is the Huaiyang Garden, which serves exceptional gastro creations by celebrity master chef Zhou Xiaoyan. How about braised Hokkaido sea cucumber with shrimp roe?

You cannot go wrong with any of the five hotels at the Londoner Macao. The elegant rooms have a panoramic view of the "Asian Las Vegas".

4. Abraj Al Bait, Mecca, Saudi Arabia - 6,000 Rooms

Mecca is Islam's holiest city, the religion's geographical center, and the most important pilgrimage city in the world. So it was clear that the city needed a large complex to host all the arriving guests.

As a result, the Abraj Al Bait is not only one of the largest hotel complexes in the world but also the third tallest building, at 1,972 feet (601 meters).

Big Ben on steroids

The building's four-sided face clock is 1,300 feet (400 meters) above ground and can be seen from 16 miles (25 kilometers) away.

No wonder, as it's the world's largest clock with a 141 feet (43 meters) diameter. You can visit the tower's top four floors, where the Clock Tower Museum is located.

The seven skyscraper complex's construction cost US$15 billion, and with 6,000 rooms, it became the largest hotel in the Middle East.

The building's base is filled with five floors of shopping centers, restaurants, conference rooms, and a prayer room accommodating up to 10,000 people.

The tallest of the seven towers is home to a 5-star hotel containing 1,618 rooms and suites operated by Fairmont Hotels and Resorts.

3. MGM Grand Las Vegas, Las Vegas, USA - 6,852 Rooms

When the MGM Grand opened in 1993, it had a quirky Wizard of Oz theme, including Emerald City, the fictional capital of Oz.

The hotel kept its legendary green-lit facade while all the Oz-related casinos were closed and demolished.

Another interesting story about MGM Grand is its entrance. It used to be shaped like a giant lion's head, where people entered through its mouth.

However, the hotel's management found that people from Asia found it bad luck to walk through a lion's head and avoid the MGM casinos. As a result, it was removed, and as they expected, their revenue soared.

But MGM used to be home to real lions too. It had a 5,000-square-foot glass house for lions inside its casino area, but it was closed down permanently in 2012, possibly due to animal welfare reasons.

The giant resort still holds a lot of entertainment. For example, it has one of the largest gaming floors in Vegas, measuring 171,500 square feet (15,930 m2) with over 2,500 machines and 139 poker and table games.

The MGM Grand has 6,852 rooms, including suites and Skylofts with floor-to-ceiling windows and a personal butler ready for your order at any time of the day.

Outside of the 30-floor building, you will find five outdoor pools, rivers, and waterfalls.

- The biggest hotel in Vegas -

2. The Venetian Resort, Las Vegas, USA - 7,093 Rooms

The Venetian is one of the most special-themed hotels in Vegas. And that's no small feat considering it's in a city where the hotels have artificial lakes like the Bellagio, or a half-scale, 540-foot (164.6 m) tall replica of the Eiffel Tower, which is part of the Paris Las Vegas Hotel & Casino.

It was inspired by Venice, and the complex features various Venetian landmarks, including the Grand Canal where pretty gondolas cruise on a quarter-mile indoor waterway with a sky-painted ceiling. The gondola ride takes 14-minutes from one end to the other.

The Venetian-Palazzo complex is centrally located at the north end of The Strip, and it has the world's second-largest hotel (the largest in the USA!), with 4,049 rooms and 3,068 suites.

There is also a 120,000-square-foot (11,000 m2) casino for all the gambling fans.

In 1999 when it opened, it was the world's most expensive resort, with a construction cost of $1.5 billion. Nevertheless, the Venetian project was so successful that its owners decided to open its replica in Macau - The Venetian Macao.

Soaking in style is what the Venetian's pool is about. Blue striped cabanas with a hint of privacy and half-submerged sun loungers in the pool. And if you get hungry/thirsty, the Mediterranean Spritz Restaurant & Bar has you covered.

- The world's largest hotel -

1. First World Hotel, Genting Highlands, Malaysia - 7,351 Rooms

The First Hotel is part of the Resorts World Genting complex. Its two towers have 7,351 rooms, and it holds the Guinness World Records title for the largest hotel in the world.

Genting Highlands is about an hour's drive from Kuala Lumpur, and it's the only place in Malaysia where non-Muslims can gamble. So, you will find many foreigners trying their luck here. In addition to the casino, there is a giant amusement park.

The residents of KL mainly go to Genting Highlands to escape the heat in the city, as the area is located in the mountains, where the weather is much cooler.

Well-known Las Vegas artists perform there regularly, as well as musical bands from around the world. The hotel has so many rooms because of these fun activities attracting crowds and Genting Highlands' remoteness.