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 imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

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

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

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

An angelic, yet demonic-looking figurine presides over one of Glasgow's most ancient streets.

One of the first monuments dedicated to the accomplishments of the great Vice Admiral, Horatio Nelson.

Inside this art museum resides one of Glasgow's most famous musical instruments.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

The location of this historic castle was inspired by a donkey.

A close look reveals that the Scottish monument is just slightly off-kilter.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

The most loyal of little dogs, or a Victorian era publicity stunt?

Macbeth's infamous "Great Birnam Wood."

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

A scattered trail of street art adds a pop of color to the city's stark structures.

Largest lake in Great Britain measured by surface area.

The heads of two giant mythological water horses honor Scotland's horselord past.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

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