Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

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

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

Hundreds of years ago, this lion-shaped door knocker could help a person accused of a crime find temporary safe haven in Durham Cathedral.

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

A hundred copies of Antony Gormley's naked body stare out across the water.

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

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

These rusting, skeletal structures are monolithic monuments to Glasgow's industrial past

A scattered trail of street art adds a pop of color to the city's stark structures.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

An artist's whimsical transformation of everyday objects.

Take afternoon tea in a 17th-century almshouse.

These lamps were created to expel sewer gases after an event known as The Great Stink.

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

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

This 1920s Dutch barge is now a floating bookstore.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

Go surfing on this urban wave, "hacked" by local surfers.

The 30,000-volume library is one of the world's most impressive poetry collections.