This Florida sinkhole hides a rainforest-like micro-environment in its depths.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

A mysterious castle built as a monument to lost love.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

A house carved into a rock in the 1940s.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

A ghost town at the airport is now a refuge for blue butterflies.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A meditative space out of a fantasy story.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

A hotel and restaurant serving as the mecca of kitsch.

Tiki luxury on Nob Hill.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A strange house built only at night, with rumored mystic inspiration.

Towering basalt columns, a creation of fire and ice.

A hand-built folk art installation covered with messages of God's love.