This work of art was conceived as a mosaic originally designed to decorate a car dealership.

Long tunnels run under the ancient chariot racing circuit to the tower.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

This Roman arena once played host to bloody gladiatorial battles.

A shrine built to combat the bad karma of a commercial venture.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

A unique tribute to the millions of animals who served and died for the British military.

Pop culture has helped to keep this iconic British building from being destroyed.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Elaborate tile work in this railway station tells the story of Portugal.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Macabre astrological automaton clock dating to the late 1400s.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

Ancient snack bar of the Roman Empire re-opened.

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

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

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

Pompeii's less famous neighbor is still revealing her secrets.

The only museum with its curator—and her pets—buried inside.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

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

This community on a small Venetian island has taken to painting their houses in bright neon hues.