Retirement home for giant obsolete machines.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Floating swimming pool within a moored vessel.

These strikingly barren, rolling red hills were caused by bad farming practices.

Little island known for its massive beachfront "flowerpot" pillars.

A restaurant and observation deck built in a unique broadcasting antenna.

The only surviving prototype for Buckminster Fuller's house of the future.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

A gothic church spire sits atop this skyscraper, the tallest church in the world.