Peek into a cave of giant, glimmering crystals.

This historic streetcar system has been running since the 19th-century.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

These ancient ruins hide in plain sight next to a dessert shop.

This "volcanic all-day restaurant" is right on the beach.

Gladiators once walked this ancient, subterranean passage.

Built by the Ancient Greeks, this chariot bridge is still in use today.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

A little-known park with unusual, half-ruined structures and a mystical energy.

A two thousand year old brothel uncovered in Northern Greece.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

Where commuters walk through remnants of an ancient Greek necropolis.

An autonomous republic of Orthodox monks.

Hideout of thieves, monks, and goat-footed gods.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

A giant baby floats in the middle of Singapore’s nature park.

An artist crafted this lonely left hand as an imagined relic from Singapore's history.

The history of those incarcerated in Singapore during World War II is etched into the bricks of a popular staircase.

Across this single-file rope bridge is what has been claimed to be the edge of continental Asia.