After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

The unfinished final resting place of some of Spain's most prominent politicians.

This former fascist summer camp was abandoned for decades.

This historic fountain is a favorite neighborhood meeting point.

A pair of gigantic baby heads greet passengers at Atocha Station.

One of Madrid's most beloved statues is of an anonymous citizen.

A well-worshipped shrine to the Virgin Mary nestled inside the last of Zagreb’s historic gates.

This 135-year-old weather station studied the effects of the climate on human health.

The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.

This whimsical public art installation is a unique homage to Liverpool's industrial heritage.

The red letters in the literary pavement leading to the library form a mysterious code.

On the outside of the Mersey Tunnels, an Art Deco sculpture of an Egyptian Pharaoh wears goggles and racing gear.

One of the largest squares in Europe contains an entire artificial island.

The tomb of the mythological founder of Padua is not hidden in some obscure crypt, but stands right in the middle of the city square.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Right up until the 20th century this network of man-made caves was the biggest village in Eastern Armenia.

Centuries before the modern seismograph, Armenian monks measured quakes with this tilting pillar.

This series of Armenian caves held the oldest brain, shoe, and winery in the world.

Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

An artist's cute bronze subway sculptures belie his violent artistic past.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.