Inside the World's Greatest Hotels

Caesar's Palace has been the heart and soul of Vegas for more than 50 years. Meet the staff who keep make this 4,000-room hotel running 24 hours a day, visit a high roller's secret luxury villa, learn how to cater for 3,000 people per day, hear the secrets of the casino floor, and see a young couple tie the knot Vegas-style.

Once known as the 'Savoy of the East', the guests at the Raffles Hotel in Singapore range from royalty to rock stars, and from politicians to poets - plus the occasional tiger.

Inside The Ritz - a bastion of privilege for over 100 years.

Checking out The Plaza, on Fifth Avenue in New York. A magnet for stars as bright as The Beatles and F Scott Fitzgerald, it has been a beacon of opulence since its opening in 1907.

Checking in to one of Sin City's most iconic hotels, The Bellagio in Las Vegas. The hotel has welcomed everyone from Hollywood's Ocean's Eleven cast to the highest of high rollers.

Checking in to Claridge's, a quintessentially English hotel. A private retreat for Royals and politicians, and the ultimate venue for A-listers such as Kate Moss.

A look is taken at the luxurious landmark hotel, which was built in 1928 and boasts sophisticated rooms and suites, an ornate tea lounge, a chic bar and much more.

The staff of the Browns hotel in London, including the hotelier, head concierge and drinks maestro, discuss what it takes to help keep the city's oldest hotel in working order.

Behind the scenes at the Beverly Hilton in Los Angeles, which has played host to Hollywood royalty for the last six decades, as well as a host of politicians. Hotel manager Michael Robertson gives a tour of the penthouse suite where Barack Obama recently rested his head, showbiz reporter Jeremy Louwerse relives the moment he was dragged into the pool for an unexpected dip with Angelina Jolie, and head chef Matt Morgan breaks down what it takes to deliver a three-course dinner for the who's who of Hollywood

Behind the scenes at the Hotel Atlantis in Dubai, which is perched on top of a giant manmade palm tree-shaped island in the Arabian Gulf and opened just 12 years ago. Celebrities and millionaires flock there to experience the hotel's underwater suite, where sharks and 65,000 marine animals swim just feet from the bed.

Behind the scenes at the Peninsula Hong Kong, a baroque building on Kowloon harbour that has two rooftop helipads for its big-spending customers. Fleet manager Martin Oxley gives a guided tour in one of the hotel's 14 green Rolls-Royces, while executive chef Florien Trento shows off the Philippe Starck-designed Felix restaurant.