The only structure left with direct ties to the Salem witchcraft trials of 1692.

These fantastically named natural pools look like something out of a Scottish myth.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

360° views of the city plus five floors of optical illusions and hands-on science.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

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

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

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

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

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A very classy 1920s-era bar right in Grand Central Station.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A semi-scholarly approach to sex.

A giant Troll lurks under one of Seattle's oldest bridges.

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

Elevated freight railway turned wildly successful urban park.

A walk through the historic city center, under the streets of Seattle.

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

The final resting place of soldiers' loyal canine companions.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.