This millstone-topped marker details the history of a mill that served as a landmark for both Union and Confederate soldiers during the American Civil War.

A derelict bit of transportation infrastructure hidden in the woods.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

These unusual rooms on wheels are holdovers from the 1960s.

This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

A memorial to the politician who became Great Britain's first fatality to be caused by a locomotive.

Pyramid shaped monument with a tall tale attached.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The Liverpool street made famous by the Beatles is real.

Regency-era excess on the English Coast.

This tiny town features a tiny town that acts as a 3D snapshot of the town during the 1950's.

This commemorative stone was erected near the first Scout campsite.

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.

This historic home of the author of Lawrence of Arabia, has a history of literary celebrities and monogrammed sleeping bags.

A popular day's outing in Bovington consists of watching military tank driving practice.

In 1943 the British military took control of this village, telling residents they had to leave temporarily. The villagers were never allowed to return.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

At 207 feet, one of the world's longest continuous escalators.

Advice-columnist's bell tower, paid for with pennies.