What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.

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

The world's most active stratovolcano is almost always erupting.

These relics of the city's past now exist as a prominent modern feature.

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

The video game-themed street art first popped up in the French city.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Designed as a reminder of one of the darkest moments in Austrian history.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

A gift from Emperor Franz Joseph I to his wife.

This museum is dedicated to the little known ancient Roman history of Vienna.

The world's most important buildings shrunk to a tiny size.

The first modernist church in Europe.

An ornate private entrance to the Vienna subway built specifically for the emperor.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.