Plenty of hotels boast stunning works of art. Very few can count their buildings themselves among the art. The Hang Nga Guesthouse — colloquially known as the Crazy House — is among the latter. Created by Vietnamese architect Dang Viet Nga, this unique destination offers ten guest rooms, each themed after a different animal and with furniture that's custom crafted to match the rooms' unique shapes. With its interesting, polarizing, expressionist architecture, the house offers separate rates for those who simply want to walk around — but even though the rooms are limited in number, the nightly rates are actually quite affordable.