From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

Tour the original street level of Port Angeles, buried underground in 1914.

A ghost town revived by hippies and wanderers throws its own special brand of holiday parade.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The Habsburgs' royal collections of art and wonders.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Not one, not two, but three natural bridges remain in this captivating spot post-sinkhole.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

A 18th century graveyard and its astonishing cortege of macabre iconography.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Unique geological formations in China, featuring some suggestive shapes.

The resting place of 18th century German mummies.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

A garden in Lisbon filled with giant porcelain creatures.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

This unusually shaped mountaintop tower looks like a UFO floating over the city.