The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A naturally beautiful, seemingly bottomless deep blue spring.

A Mayan village preserved for centuries in volcanic ash.

The translucent turquoise hue of these natural swimming pools comes from a high concentration of minerals.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

This wildlife refuge is home to more than 200 species of birds, as well as monkeys, lizards, and other wildlife.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

These enigmatic ruins continue to vex archaeologists.

This massive Maya archaeological site is home to the tallest man-made structure in Belize.

A natural swimming hole that was once a ceremonial center for Mayan priests.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

An important Mayan religious and trading center dating back to 200 BC.

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

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

A natural tidal swimming pool is ringed by bizarrely artistic lava rock formations.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.