This former mill comes to life during the Christmas season.

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

An autonomous republic of Orthodox monks.

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

The hallucinogenic center of the ancient world.

A spectacular Neoclassical palace is home more than 15,000 artifacts and works of art.

A scenic UNESCO site that doubles as a habitat for various forms of wildlife.

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

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Picturesque basketball courts sheltered by historical defensive walls and with an enviable sea view.

A field filled with carved medieval tombstones called stećak.

The largest cave in Bosnia and Herzegovina is home to some the richest subterranean biodiversity in the world.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

The local club's soccer field is practically surrounded by UNESCO-protected monuments.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An excavation site that signified Hercules in Pula, and a glimpse into the city's Roman history.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

An iron dragon with a long neck covered in feathery scales perched above one of Venice's most popular squares.

The endangered animals of the southern Canadian prairie are on larger-than-life display in this tiny town.

Wading through a small lagoon reveals a secret, wild stretch of pristine beach.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Michael Heizer's masterwork in the Nevada Basin.

A large, remote national monument highlights the typical geologic structure seen in Nevada.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."