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

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Megachurch turned Catholic church comprised of 10,000 glass panes.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This pun was simply waiting to come to life, and one defense contractor made it so.

Outsider art meets paleontology at this roadside reptile repository.

One street divides a single town that stands in two U.S. states.

The highest point in Virginia can only be reached by passing through ponies and flowers.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

Rural churches in the middle of nowhere with religious frescoes by famous artist.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.