Thermal springs underneath the seabed provide the heat and bubbles for these beachside natural hot tubs.

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This colorful gate stands as an entrance to the walled city of Old San Juan.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

The colonial city's social history is reflected in its fanciful door knockers.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

An Inca spa, military outpost or maybe… both?

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

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

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

Did Inca children also slide down these smooth rocky slopes above Cusco?

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.

It took 82 years and four different plaques to finally get the story right.

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.

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

This stone complex marks the urban center of a lost civilization.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.