A man's home is his castle.

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

A house carved into a rock in the 1940s.

A house built from trash known as the poor man's Hearst Castle.

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

Live long and prosper in Tennessee.

A private home built to resemble the shape of a microscopic creature.

A castle that was built stone by stone by an eccentric journalist.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

A celebration of once forgotten materials.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This fairytale-inspired cottage was created by a university literature professor.

A bizarre house filled with an astounding array of collections.

An abandoned castle owned and ignored by Masons carries a cursed history.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

This Great Depression-era creation was once known as the strangest house in the world.

This is the house that spite built.