Northern Ireland's Brobdingnagian stepping stones.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

The atmospheric road was never meant to be so creepy.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

A small collection of objects of a bygone era hide in plain view.

The ornate structure is part of a building boasting more marble than the Vatican.

The oldest house in Glasgow is now a museum dedicated to the city's medieval history.

An 18th-century religious argument etched into stone.

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

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

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

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

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

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

These markers are used to document elevation changes around the famed dam.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Experience a charming 1930s version of "infotainment."

An ode to one of the dirtiest jobs during the construction of the Boulder Dam.

A large sculptural artwork and garden in Escondido, California.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

The quirky salon doubles as a retro museum run by the world's leading "hairstorian."

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.