The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

A moody and picturesque riverside ruin overgrown with vegetation.

A remarkably intact castle that once was the largest in Ireland.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

Local legend says the remains of Father Christmas lie within the medieval grounds.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

The first museum in the world devoted to sexual gadgetry.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

This spooky statue sits outside a famous Prague theater.

This doorless 20th-century elevator doesn't stop or slow down.

Macabre astrological automaton clock dating to the late 1400s.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Where once there was a train station bathroom, there is now this German burger joint.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

A quaint Russian village in the middle of a German metropolis.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Metro station with a claim to rock n' roll fame.