The world's first ice hotel is still one of the most elaborate and beautiful.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Unfortunately, you can no longer spend a night in this single-person treetop hotel.

A gigantic shoe, inspired by a nursery rhyme, sits in a park atop Mumbai’s Malabar Hill.

A nearly unconquerable island-fort in the Indian Ocean.

The ancient water tanks remain some of the ruined city’s most beautiful architecture.

It turns out that a hurricane-prone beach is probably not the best place to house wild animals.

Hike the ruins of a zoo that was shut down by an unsolved murder.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

A century ago, aspiring socialites climbed on this cement beast with the hopes of marrying a millionaire.

A deserted hodgepodge of experimental structures designed by nearby university students.

Browse through roughly 130,000 titles in the world's largest independent video rental store.

Part shoe store, part sociopolitical art gallery, part zoo.

A magnificent menagerie of oddities, including taxidermy cryptids.

A sincere and thoughtful art installation, mistaken by many as a statue of a penis.

Inspired by a piece of concrete, these three pyramid-shaped buildings have been beloved Indianapolis landmarks for over 50 years.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This oversized flute-playing Ancestral Puebloan deity is also a landmark of Southwestern kitsch.

A historic hydroelectric power plant serves as the unusual backdrop for a public park.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.