Borgata Hotel Casino & Spa, Atlantic City, New Jersey, USA

This shimmering golden hotel opened its doors in 2003 and towers over the Marina District in Atlantic City. In Renaissance Pointe, a few miles from the well-known casino-lined Boardwalk of the East Coast city, there are three enormous hotel casinos. This is one of them. It boasts two nightclubs, five pools, 2,000 rooms, 14 restaurants (including high-end locations from well-known chefs like Wolfgang Puck), and a massive casino with over 3,000 slots and games.

The Parisian Macao, Macao, China

The Parisian Macao, China's answer to Las Vegas, isn't the largest hotel in Macao, but it's certainly up there with an amazing 2,500 rooms. The integrated casino resort, which debuted with much fanfare in September 2016 at the southernmost point of the Cotai Strip and has hundreds of shops, a 1,200-seat theater, and a water park, was inspired by the City of Light. Its 531-foot (162-meter) reproduction of the Eiffel Tower, the backdrop for nightly light and music performances, is one of the direct tributes to Paris.

Harrah’s Las Vegas, Las Vegas, Nevada, USA

Harrah’s Las Vegas, Las Vegas, Nevada, USA

Harrah's Las Vegas, the first mega-resort in Sin City on our list, was previously known as the Holiday Casino when it first opened in 1973. It underwent a name change in 1992. Currently under Caesars Entertainment ownership, Harrah's Las Vegas boasts 2,542 guest rooms, including some of the biggest suites in the city, that have been recently remodeled. The largest, the Penthouse Suite, is 700 square meters (2,000 square feet) and comes with a gaming table, a full-sized bar, and, of course, knock-out views.

Marina Bay Sands, Singapore

With 2,561 rooms and suites distributed across its three 55-story buildings, this sprawling luxury hotel on Singapore's Marina Bay has been one of the biggest in the world since it opened its doors in 2010. The centerpiece of the remarkable Moshe Safdie-designed building is the SkyPark, which rises to a height of 650 feet (200 meters) and seems to hover above its three buildings. In addition to its three upscale rooftop restaurants, the hotel has the longest rooftop infinity pool in the world, stretching 492 feet (150 meters) in length.

Disney's Pop Century Resort, Orlando, Florida, USA

Disney likes to go large, whether it's with its hotels, cruise ships, or theme parks. At Walt Disney World in Orlando, the Pop Century Resort—which boasts more than 2,750 guest rooms—is one of the biggest of its hotel properties. With each of its buildings symbolizing a decade, the structure is intended to transport visitors on a trip through pop culture from the 1950s to the 1990s. Around a whimsical pool area including Play-Doh baths and huge jukeboxes, the four-story motel-style structures are arranged in a circle.

Hilton Hawaiian Village Waikiki Beach Resort, Oahu, Hawaii, USA

Hilton Hawaiian Village Waikiki Beach Resort, Oahu, Hawaii, USA

This enormous hotel, which is located next to Waikiki Beach, has undergone a significant makeover. As its name implies, it was formerly the low-rise Niumalu Hotel, although now days it feels more like a town. It opened in 1928. Its five buildings, which span 22 acres, have 2,860 rooms and suites, 18 dining establishments, a bar, and more than 80 retail stores. It also features five pools, one of which is the 5,000 square foot (1,524 square meter) Paradise Pool, which contains Waikiki's biggest slide, measuring 77 feet (23.5 meters).

Paris Las Vegas, Las Vegas, Nevada, USA

This well-known icon in Las Vegas, which debuted in 1999 and added a touch of Parisian elegance to the Strip, exudes a certain joie de vivre. The resort, which spans 24 acres, has 2,916 guestrooms, an 85,000-square-foot (7,896-square-meter) casino, and landmark reproductions. These comprise the 50-story Eiffel Tower, the Arc de Triomphe, the Louvre and Paris Opera House facades, and the hotel tower, which is 34 stories tall and resembles the Hotel de Ville. Go up the tower for one of the finest views of Sin City.

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Park MGM and NoMad Las Vegas, Las Vegas, Nevada, USA

2,993 hotel rooms and suites make up the combined total of Park MGM and NoMad Las Vegas. 2019 saw the opening of the two hotels, which are billed as "two distinct luxury hotel experiences under one roof" and were the result of MGM Resorts

 International's $550 million renovation and rebranding of the old Monte Carlo Hotel. In addition to housing the biggest Eataly location on the Las Vegas Strip, Park MGM was the first casino on the Strip to be smoke-free. At the same time, NoMad focuses on providing visitors with a more intimate, boutique-style luxury experience.

Treasure Island, Las Vegas, Nevada, USA

Treasure Island, Las Vegas, Nevada, USA

This daring resort may have scaled back its pirate motif, but it's still enormous. With over 3,000 rooms, it attracted visitors with its pirates and fireworks when it first opened in 1993 in a prominent spot on the Las Vegas Strip. Its signature Sirens of TI performance was canceled in 2013 as part of a shift away from its pirate beginnings, although the overall feeling of a tropical island persisted. The expansive resort, which Phil Ruffin owns privately, joined Radisson's hotel roster in 2019.