The first public library in the Americas has more than 45,000 books dating back to the 15th century.

This piece of a Renaissance-era Spanish castle remained lost for decades.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

A church dedicated to the Mexican skeleton saint.

This once-abandoned mansion is now a dreamy event space.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A salt lake dotted with steaming limestone chimneys.

This impressive system of tanks was used to store drinking water as long as 2,000 years ago.

Crumbling pyramids and temple ruins stand within the shadow of this sacred butte.

The skeletal remains of the famous hominid "Lucy" were found at this spot.

This small roadside eatery exists in both the Northern and Southern hemispheres, as the equator runs right through it.

Burial site of the world's most widely known researcher on the endangered mountain gorilla.

For millennia, explorers were obsessed with discovering the source of the Nile—is this small mountain stream really the answer?

These strange piles of magnetized volcanic ash travel across the desert about 50 feet per year.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

This amateur-built East African church with mismatched towers is an architectural abnormality.

A hollowed-out baobab that became the horrific final resting place of leprosy sufferers, with gruesome evidence to prove it.

Wondrous stalactites house thousands of bats in these African caves.

Over a million items cram the shelves at Africa's largest shop of used and rare books.

The world's largest pineapple building honors Bathurst's favorite fruit.

Caves that can't seem to quit producing the remains of prehistoric humans.