After mysteriously refusing to surrender at the end of World War II this sunken submarine was only salvaged in a search for Nazi gold.

At the United Kingdom's only residential library you can sleep among the books.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

A monument with a strange legend involving a horse's tongue.

Though this bridge was originally built in the 12th century, only one of its 10 arches dates back that far.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

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

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

A rather grand, but tiny, folly on the banks of the River Wear associated with a Polish count.

An unusual stone chair can be found on the banks of the River Wear, not far from Durham Cathedral.

Follow the original medieval paths that wind through this intriguing section of the city.

One of the shortest streets in York has an especially odd name.

This network of narrow, medieval passages has the most delightful name.

Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

Be on the lookout for the symbolic insect all over the city.

The city of Manchester quietly unveiled this tribute to a 19th-century massacre.

Manchester salvaged this sculpture of the adopted Mancunian when it was no longer wanted in Ukraine.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

This stone once marked the boundaries of Liverpool's medieval markets.

Most of Britain's gold reserve was secretly stashed here after the start of World War II.

The grand complex of buildings that comprise Liverpool's Exchange Flags includes a vast World War II bunker that has been frozen in time.