The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Where manatees are the snowbird vacationers in these balmy Florida springs.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

Beautiful natural falls where Satan once ruined a pot of beans.

The childhood home of the meat inspector who would become the face of America.

Restaurant in a 1741 farmhouse that touts the story of its haunting on its menus.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Where Eunice Williams was murdered by natives, and where locals say her ghost still haunts.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

A mouldering Colombian bull ring stands as a reminder of the country's complicated relationship with a brutal sport.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

Ripped apart by a bomb in 1993, the shell of Pablo Escobar's infamous vacation house still stands.

Former drug lord’s manor, now a theme park. Watch out for the hippos.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.