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?

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

A fascinating little museum all about the rich history of Peru’s famous plant.

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

A Christian monastery stands on what was once a holy Incan temple.

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

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

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

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

This now-abandoned shopping center in Playa del Carmen was built to resemble a medieval European castle.

Few of the many visitors to this resort town know of its hidden Maya ruins.

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.

A park that allows you to get up close and personal with one of the world's largest open volcanic craters.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

This concrete sculpture features a woman opening her heart to showcase a beautiful fern.

This oceanfront 1920s house museum offers visitors historic art and rare plants across five distinct ecosystems.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

Found: Garden of Eden in Miami-Dade County, Florida.

A mysterious castle built as a monument to lost love.