A perilous medieval road leading right into the sea.

This collection of ancient, mountaintop, underground tombs was once hidden by decades of bloodshed.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

A physical reminder of Earth's ancient past, this rock results from the photosynthetic processes of some of the oldest forms of life.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.

A museum of carnival attractions where you are invited to ride the rides.

A valley of unique erosion patterns lends to a view like nothing on Earth.

A market for witches is hidden within a train station.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A 14th century castle built on the seat of a mighty giant.