Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

Uninhabited islet in the Caribbean is the sanctuary of giant lizards.

This island hill is strewn with boulders carved by shipwreck victims from the age of sail.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

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

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

These azure waters were thought to lead to the Mayan Underworld.

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

Iconic red and white plaques show the creative names invented to navigate the city streets.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

Go inside to really appreciate this 500-year-old technological masterpiece.

Pilgrimage site for star-crossed lovers.

The only castle in North America to ever house European sovereigns.

Part bookstore, part café, and part forest.

Frida Kahlo's childhood home, now a museum of her life and works.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The oldest Roman lighthouse still in use.

Moorish signal station on a stratgic rocky outcrop.