Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

An abandoned amusement park based on the popular 1940s Red Ryder comic strip.

A burnt-out motel with priceless Native American artwork in the basement, redeveloped into apartments.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This is why we can't have nice things on the Incan Trail.

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

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

The remains of what was the most important religious complex in coastal Peru for over a millennium.

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

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.

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

Now containing the bones of the actual conquistador, instead of someone else.

A market for witches is hidden within a train station.

Time has stopped at the house where Gandhi died.

A blooming house of worship for the masses.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

The world's second-largest sundial, made entirely out of stone.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

First planned industrial community in the United States.

A Bibliophile's Dream.