On moonless nights, it's said that you can still hear the church bell of a village that was swept out of the dunes and lost to the rising sea.

In the middle of the Alaskan wilderness, lies a train trestle to nowhere.

An ancient site that has revealed incredible artifacts including portions of the Themistoclean Wall.

This replica of Michigan's mighty Mackinac Bridge is more than 200 times smaller than its northern counterpart.

See the world's biggest spool of thread, along with the largest collection of sewing machines.

Erosion has transformed this sandstone boulder into a massive dune-filled cavern.

A small rural town hides Indiana's tallest waterfall.

This simple wooden cross is said to mark the grave of an unknown sailor who washed ashore nearby.

Legend holds that the Ancient Greek goddess of love once bathed in the waters of this grotto.

A sign marks where the two bodies of water meet.

Tradition says that William the Conqueror dined on this stone after landing his Norman invasion fleet nearby.

Legend has it these caves were created by a deity called Ogba, who is said to live inside the winding subterranean caverns.

The home and studio of one of the most celebrated female artists of the 19th century.

This cave in the heart of La Mancha is full of esoteric secrets.

Among the may artifacts on display is a clock made of 50,000 individual pieces of wood.

This life-sized sculpture has gained a reputation for bringing luck to anybody who touches it.

Local legend says a monk brought Christianity to Bornholm through his sermons in a cave inside this free-standing rock.

A lingering bit of Space Race nostalgia lies in the middle of the desert.

This modern artwork, inspired by the Bayeux Tapestry, tells Battle's early history following the Battle of Hastings and the Norman Conquest.

A spring and an enigmatic cabin lie in a ponderosa pine forest in the heart of the Desert National Wildlife Refuge.

This impressive Gothic church dates back to 1244 and stands on the site of one of the first churches in Scotland.

On the side of Christchurch Mansion is an enigmatic block of dark limestone that dates back to 14th-century Belgium.

At this site, two historic stone bridges spanning the Sing Sing Kill—one right on top of the other.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.