The world's longest known cave system.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

A full-scale replica of a 1774 colonial settlement in Kentucky.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

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.

Paths are maintained, but trees have taken over plots.

Local myth claims this is a Sears catalogue home with its windows installed upside-down.

This bar hosts an ever-evolving napkin art installation devoted to an American president.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

Mexico's astounding mummy museum with "the world's smallest mummy."

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Huge stone depressions which may have acted as an Incan agricultural experiment.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Only hotel where you can legally launder money.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.