The enigmatic and seldom visited ruins of a Mayan city-state.

The development of this cliffside waterpark is representative of Mexico's history of co-op tourism developments.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

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.

Trek through the jungle on a boat and a swinging bridge and you'll be rewarded with these refreshing, if pungent, mineral pools.

Thousands of well-dressed mummies below a monastery.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

Rows of stone statues are dressed up to mourn children that are lost before birth.

You'll never meet anyone this passionate about elephant droppings.

A Buddhist shrine in a cave protected by macaques next to dark passages lined with creepy paintings.

A white Buddhist temple with a golden restroom.

A modern temple with an ancient philosophy.

An imperial art museum offers edible versions of its most treasured displays in an on-site fine-dining restaurant.

A Buddhist temple covered in intricate designs and carvings made out of seashells and pieces of coral.

A vast Communist-era exhibition space in the Bulgarian capital.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Countless grotesque faces stare out from this eerie Prague art wall.