Venture into the hideout of one of Hong Kong's legendary pirates.

A small village in two different countries.

Huge winged monument in the United Kingdom.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

England's most notorious suicide spot.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

Fifteen Jodhpur queens left their handprints before going to their fiery death.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

A complex of six forts embedded in the Rajasthan hills.

A beautiful discovery site of prehistoric burials.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This winding road through an Italian canyon may be the most scenic drive in the world.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

A subterranean house of worship carved right out of the bedrock.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The final resting place of the poets Shelley and Keats.

Architectural monsters are devouring this palace's every door and window.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Rome's semi-secret peephole vista is also a former Crusader stronghold.