This architectural oddity is an oasis of green on the outskirts of Valencia.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Vibrant street art created with mixed media.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

The construction of a tram line unveiled hidden remnants of the old medieval city.

One of the world's tallest statues is also one of its most hated.

A madman's personal garden filled with 1,000 sculpted heads.

A study of Fascist era Art Deco design in Italy.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Some islands... they come, they go, especially on Lake Travis.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

Former estate of Lenin, now home to his death mask.

Stalinist skyscraper built with help of cryotechnology.

The tallest hotel in Europe.

World's largest bell sits on the grounds of the Kremlin in Moscow.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.