When the water level in the Danube in central Budapest is low enough, there is a secret site telling the history of one of the most iconic bridges of the city.

One of the earliest Ataturk monuments commemorates the victory of the Turkish War of Independence.

At this ancient settlement at the foot of Mount Babadağ, honeycomb tombs are carved into a round cliff.

A deadly ancient portal to the underworld.

This train station's platforms were built extremely narrow to deceive a rather arrogant government official

This popular shopping mall and eatery once provided scant comfort to sick colonials and seafarers

Tombs containing the remains of some of the first and most important professors of medieval Bologna

Built on the side of a mountain, this once poor village has been turned into the "Santorini of Korea"

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

This building features dozens of faces along its facade, although one is a bit chilling.

Sturdy scales are a surprising thing to find in a modern European city.

One of the most notable figures in the Wurstelprater’s history is often assumed to be a fictional character.

A memorial to those who donated their bodies to science.

One of Vienna’s oldest (and perhaps most haunted) alleys, allegedly with a bloody past that gave it its name.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

Physicist’s epitaph provides final confirmation to a career of turmoil.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

This small, ingenious cannon once helped regulate Parisian life.