This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The world's oldest known salt mine.

Narrow-gauge railway with its own personal power grid.

A mecca for India's Jains.

The hallucinogenic center of the ancient world.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Where commuters walk through remnants of an ancient Greek necropolis.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Historic medieval fortified city in southwest France.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

For hundreds of years, this huge figure has been blessing visitors before they explore his body.

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

Pilgrimage site for star-crossed lovers.

Fortified medieval tower house with lovely roof garden.

A lover's walk between hilltop towns, decorated with graffiti love notes.

The bomb-ravaged remains of of a colossal Neptune.

A mushroom-shaped outcropping that has come to be the symbol for an entire town.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The glowing blue Nymphaeum of Emperor Tiberius.