Marina Bay Sands , Singapore

If construction costs are a traveler’s bag, then they’ll delight in seeing the Marina Bay Sands, a resort that cost US$5.7 billion to build, making it the world’s most expensive building when it opened in 2010. The Marina Bay Sands is an integrated resort that has it all: a luxury hotel, restaurants, an endless collection of shops, a convention center that is one of the largest in Asia, theater, an ArtScience Museum and other entertainment centers. It also has an indoor skating rink made with synthetic ice.