London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

One of Europe's oldest libraries.

Three bridges straddle a stream, one stacked upon the other.

Music boxes like you've never imagined.

The largest known medieval map of the world.

Rare collection of medieval books under lock and key.

The oldest public library in Ireland.

Obelisks and stone pineapples in the Irish countryside.

Modern sundial uses ancient methods to tell time and date perfectly.

A huge museum of much more than just agriculture displayed in a princess's palace.

A strange machine made to evaluate the world economy using water and lots of tubes.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

The Last Home of an Executed King.

The longest hedge maze in the world.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

The world's brightest bioluminescent bay.

A massive underwater sinkhole made famous by Jacques Cousteau.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

The world's largest bioluminescent area was undiscovered by science until 2005.

A white oak with property rights.