The most biologically diverse protected area in Africa is also the most dangerous.

Home to pygmy hunter-gatherers, hundreds of animal and bird species, and the strange okapi, or forest giraffe.

Rolling sand dunes of the Sahara... in the middle of the Atlantic Ocean.

Dozens of snakes are housed and worshipped within the walls of this Vodun temple.

Did Gustav Eiffel design this enigmatic metal building?

Classical ruins that remember ancient Rome's presence in Africa.

This former cathedral is now a bustling library packed with students and pigeons.

The preserved remains of the former Milwaukee County Hospital for the Insane are hidden in the wooded grounds of County Park.

Sip whey-based vodka at the first Native-owned distillery opened on a reservation in centuries.

At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

This unconventional used book store was once in the news for the surprising act of burning books.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

A kitschy, creepy St. Louis mainstay.

A big museum full of little worlds.

This otherworldly church spire reaches up toward the heavens.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

A piece of John the Baptist in the American heartland.