Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

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

This replica of the Greek structure is in the heart of Nashville.

Walk the whole Mississippi River!

Home to drunken tower-climbing goats... seriously.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Art museum based around the collections accumulated over 58 years by one eccentric thrift store owner.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

A mysterious castle built as a monument to lost love.

Where monkeys run wild and the humans are caged.

A snapshot of the city's fascinating voodoo culture.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

At 207 feet, one of the world's longest continuous escalators.

Exact replica of the ancient monument, but much, much lighter.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.