The oldest working mechanical clock in the world.

Hear the quietest sound from across the dome.

An unusual round church in London with a Templar past.

London's smallest police station is barely the size of a phone booth.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The final resting place of soldiers' loyal canine companions.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A "hospital" where people went to be quarantined, die, and be buried in the yard.

A quintet of history museums make this Virginia graveyard as much a resting place for funereal history as it is for people.

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

This historic mansion was built as a symbol of love between a husband and wife.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

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

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

Paths are maintained, but trees have taken over plots.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

Oldest unrestored plantation house in America that is open to the public.

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

An unfinished rail tunnel that has since been used to house cheese and bats.

The record holder for the world’s largest peach.

This Transylvania County city is home to a rare white squirrel population that is descended from an escaped carnival animal.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.