The conquistador's former fortress is the oldest preserved colonial building in the Americas.

Monumental paintings, discovered in a Mexican cathedral in 1957, depict the deaths of some friars in Japan.

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

The only castle in North America to ever house European sovereigns.

These enigmatic columns tower over the ruins of an ancient Toltec city.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

Visit the secret grave of a legendary privateer who faked his own death.

Colorful murals stationed throughout Charlotte bring poetry to everyone.

This nine-story building can be played like an instrument.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

This bridge is haunted by the ghost of a distraught mother.

This ancient art form was used to capture the lives and struggles of the Haywood Street ministry.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

The secret city built by the Manhattan Project.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Stroll around the headstones of notable figures from Knoxville's history, as well as towering monoliths and melancholic headstones.

One of the best-preserved medieval streets in Europe.

Giant marble phalluses on the sacred island of antiquity.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

An intricate network of underground tombs carved into volcanic rock.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

This abandoned Greek island was the last active leper colony in Europe.

This famous archeological mystery may be an ancient example of movable type.