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

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.

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

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Ain't no party like a ghost town party.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

A living art gallery painted on a canvas of Monterey pine trees.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

The bookstore with bookshelves built into unlikely places.

A deadly ancient portal to the underworld.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

A giant gun barrel in Barbados that once hoped to shoot outer space with science.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Malaysia's first and only glass temple.

Three bridges straddle a stream, one stacked upon the other.

Steaming blood-red hot spring from hell.