An architect's childhood fantasy treehouse made real.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Gargoyle head that brings good luck.

An ancient knight and a symbol of the city's freedom.

Climb inside an iron crystal magnified 165 billion times its normal size.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A misnamed well, with a deep dark past.

"We Seceded Where Others Failed."

Monument to the cotton-destroying boll weevil.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

Postal archives over 150 years old offer a window into Singapore's culture and tradition.

The stoutest tree in the world.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Giant naked man on a hillside.

Abandoned silver mine strewn with wrecked and twisted structures.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

A beautiful geyser under environmental threat.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

It houses the remains of a 17th-century version of the Titanic.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”