The site of Paul Revere's historic two lantern warning.

A men’s restroom became a sandwich shop.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Ice cream stand, snack bar, and time capsule of milk conveyance.

This landmark cemetery in Boston was created more than 300 years ago.

Narrowest house in Boston.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

One of downtown Berlin's last reminders of its Communist past.

A book bound in the skin of an infamous criminal, along with countless other specimens.

A nuclear bunker built to shelter the politicians and important people of Scotland in case of nuclear attack.

Largest lake in Great Britain measured by surface area.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

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

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This small museum in a 17th-century building honors three iconic Scottish writers.

The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.