This mural changes every few years.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

Less a museum than a bizarre fantasy world created by artists and engineers.

This giant ice cream cone is the last remaining icon of a Salt Lake City staple.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

Dubbed the "Blade Runner dragon," this buzzing neon sign is a beloved local icon.

A tunnel with windows, so you don't miss out on the impressive views.

The fifth-longest natural arch in the world, and the longest outside China.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

This collection of Neolithic monuments make up one of The U.K.'s richest archeological landscapes.

It's said this was once the home of King James V's pet lion.

A remarkable feat of Victorian engineering across the Firth of Forth.

These characters from a Robert Louis Stevenson novel stand in an unlikely place.

Every St. Andrews student knows to avoid this inscription for fear of a martyr's curse.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

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

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

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

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

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