Storied crypts fill the most famous cemetery in Colombia.

This tiny shop has been serving traditional tamales for more than 200 years.

This striking, two-toned confluence of rivers is visible from space.

Henry Ford's failed rubber plantation in the middle of the Amazon rain forest.

Once a year, ambitious surfers can ride the world's largest river.

Dine amidst exotic plants at this former royal greenhouse.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

A magnificent collection of imperial armor and weaponry.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Harlequin costumes, signed scripts, and armor-wearing puppets.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Plaques on its facade commemorate the Tiber's most destructive deluges.

A massive marble foot is tucked away in a small alley near the Pantheon.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A statue representing a lost Roman profession that was vandalized for centuries.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

A sculpture serving as an homage to Pope John Paul II.