The oldest of the three remaining bridges in England with buildings on top of them.

A former mining village that now operates as an open-air museum.

This cliff-face port is considered a masterpiece of mining engineering.

A unique zoological park home to over 30 species of wild cats, both big and small.

The bones of two medieval royal lions were discovered at the historic fortress.

Catch a glimpse of local, native wildlife at this zoo dedicated to conservation and education.

The North Carolina grounds are leased in perpetuity to the British Commonwealth for as long as the WWII sailors are buried there.

This poignant display is now a memorial to these regionally extinct species.

A mysterious shape catches the eye in this 16th-century painting.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

A picture-perfect town, perfect for blowing up.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A hidden three-foot-wide house separates these two regal churches.

At the base of Steens Mountain resides an otherworldly desert.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

The last of the 19th-century booze-free bars has been slinging teetotal tonics for over a century.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.

This 15th century pub is one of only two pubs in England situated on consecrated ground.

The smallest pub in Britain was once a cabinet of curiosities and it still has the dead cat to prove it.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

The oldest inn in England served brew to the crusaders.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

Rare recess caves fill this unbelievably beautiful Ohio park.