The ruins of a monastery where Saint Bridget of Sweden had her revelations recorded.

The English bed-and-breakfast believed to have inspired Emily Brontë's novel "Wuthering Heights."

A massive work of modern art that appears to be a crop circle in the middle of the desert.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

An abandoned 17th-century baroque hunting lodge with a wonderfully strange architectural plan.

The remains of an Aztec school and various intriguing artifacts lie below a modern cultural center.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Home to one of the tallest church spires in Europe, this historic church once played host to King Henry VIII and Anne Boleyn.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

Nuclear waste experts study this prehistoric crater lake to envision landscapes one million years in the future.

A market built atop boats is one of the few floating holiday markets in Europe.

Psychedelic murals coat the inside of a nondescript research library.

A cave 150 feet beneath Kansas City is the perfect climate for growing 10,000 delicate orchids.

This ethereal, rainforest-like gorge is home to waterfalls, quaint bridges, and fairy folk.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

These excavated burials from the Tarim Basin are wrapped in mystery.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

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

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

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.