What are the most expensive hotels in the world? As the number of millionaires in the world grows in comparison to 20 or 30 years ago, so too does the yearning for the best of the best luxury accommodations made to quell the desires of these richer travellers. Back in the 1990s, five-figure hotel rooms existed, but not nearly as many as there are now, and hotels are clamouring to provide the top rooms and amenities that money can buy.