Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

Live long and prosper in Tennessee.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

The site of the Scopes Trial contains a small exhibit dedicated to the famous case.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

These early tent-shaped grave coverings are unique to Appalachia.

This award-winning men's bathroom was just too beautiful to not allow women to see.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

An incarceration museum on the spot of possibly the oldest prison in England.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.