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

The site of the climactic scene from the classic horror film is now a historic landmark.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

An 18th-century townhouse that once hosted guests of the president.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

This lush area was the site of extensive enemy bombing during WWII.

An inverted staircase above the entrance to the Bethnal Green Underground Station functions as a memorial for people who lost their lives during the worst civilian disaster in the U.K. during World War II.

A modern mini-Stonehenge is hidden in a public reserve, not far from a former Viking stronghold.

A trio of giant megalithic stones in the middle of a golf course.

The home of two of Scotland's most important artists has been reassembled in the Hunterian Art Gallery.

The only panel of the Great Tapestry of Scotland that has been replaced, after the original was stolen.

A remarkable example of small town medieval architecture that showcases the wealth and importance of a 16th-century wool town.

Forgotten jail cells beneath this Scottish town hall are now used for delightfully artful storage.

Those belting out show tunes in this West Village piano bar might not realize it marks the site where Thomas Paine died in 1809.

Phil Mortillaro uses keys to bring art back to the Village.

Erected in memory of Sir Arthur Conan Doyle, who was born close to this spot, this statue commemorates the author and his famous detective.

This sculpture was made out of recycled guns that were turned in to the city.

One of London's lost rivers runs through a pipe over the tracks of this subway station.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

An exceptional engineering feat that facilitates the migration of salmon upstream during their breeding season.

A Roman spa buried deep beneath the City of London.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

A Victorian school for poverty stricken waifs has been preserved as a museum to their donated education.

These remnants of Old London Bridge possess unique acoustics that allow for whispered conversations to carry from one side to the other.