For those with no fear of heights: a skywalk 4,700 feet up on a Chinese mountain.

This highest bridge in the world spans such a great chasm that it had to be established using rockets.

While exploring the desert, you can stop by the home of a fictional heretic from a parallel universe.

A wunderkammer hidden on the top floor of the Hartford statehouse.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

Home to the most complete dodo remains known - one head, and one foot.

An amazing collection of wax anatomical models and terratological models.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Come for the flowers, stay for the bats!

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

Bug-devouring flora are the stars of a special wing of the glass conservatory.

This abandoned horse racing track was an exercise in hubris from its inception.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

I-95's Tijuana-style celebration of kitsch at the Carolina border.

A former French military respite turned jungle tourism hotspot.

An abandoned town centered around a paper mill powered by a large waterfall.

Stained glass windows bathe this botanical garden in cosmic light.

This massive subterranean fissure is known as the "underground Grand Canyon."

A series of five defunct panopticon prisons in Cuba.

The abandoned site of the Beatles spiritual awakening and subsequent revolt.

This half-finished "city of toys" was almost Italy's own Las Vegas.