Home to a vast and influential collection of Shakespeareana.

The glowing blue Nymphaeum of Emperor Tiberius.

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

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

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

Giant marble phalluses on the sacred island of antiquity.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

This lagomorph-obsessed Route 66 emporium is home to a giant jackrabbit that sits in a bunny graveyard.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

Take a drunken tour inside the world's largest known geode.

This unique collection collects pieces of art etched into thin pieces of stone.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

The only surviving prototype for Buckminster Fuller's house of the future.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.