18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.

This plaque tells the story of an event that took place in an imagined parallel universe.

The first Russian Orthodox church in North America and an Alaskan landmark.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

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

An abandoned Soviet-era park that, when viewed from the air, looks like a pentagram.

A pub that is literally in the middle of nowhere, but continues to do business.

Geodesic dome luxury retreat in the Scottish Highlands.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This mountain is one of the largest in Scotland but is better known for its hollow insides.

A pagan tradition of draping trees with rags eerily lives on.

Where the sleeping monsters of Scotland's oil industry are left to rust.

This rare surviving broch is one of Scotland's most impressive Bronze Age structures.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

The sign announces the Scottish village's cosmic connections, as it's twinned with Glenelg, Mars.

The world's shortest street was created by an awkwardly placed hotel.

This lovely Scottish nature walk leads to the source of a local legend.

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

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

A stunning Victorian abbey and walled garden on a lakefront.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

This Bronze Age tomb is the centerpiece of a clearing within a beautiful Irish forest.

There might not be much left of these Irish ruins, but their linguistic legacy is still going strong.