This titanic steel chain linking two buildings was installed without permission but instantly beloved.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

This natural spring not only claims to heal the wounded but it has also been willed to God.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

One man's extraordinary topiary garden in a small South Carolina town.

One of the oldest living oak trees in the Southeast.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

An optical Illusion once believed to be an electrical phenomenon.

Glasgow’s piece of the patron saint of love.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The heads of two giant mythological water horses honor Scotland's horselord past.

This Scottish bridge seems to compel dogs to leap to their death.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

These fantastically named natural pools look like something out of a Scottish myth.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

These Honduran caves earned their magical nickname thanks to reflective bone deposits.

Right angles in the forests of Panama.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.