Salaguti's live-in museum: a fortress against criticism and consumer art.

The largest self-built castle in the U.S., six decades in the making.

Pivotal home of Nobel Prize winner Pablo Neruda.

Deadly airliner crash preserved for those willing to climb and pay respects.

"I did this all while you were watching TV."

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.

A gleaming white and undulating tower marks the border between Georgia and Turkey.

A Turkish monastery tucked into a cliff wall.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

Fortified homes of highland warriors that are still in use today.

A museum glorifying the life of Stalin, located in the city of his birth.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.