Northern Ireland's Brobdingnagian stepping stones.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A close look reveals that the Scottish monument is just slightly off-kilter.

A solemn memorial in a majestic setting that honors a 1692 tragedy.

From here, the loch appears to take the shape of mainland Scotland.

A double cantilever system bridge that was designed to prevent flood damage.

More than a century old, this cast iron bridge on the Balmoral Estate leads to nowhere.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

These oddly shaped pink granite formations got their name after being mistaken for massive piles of hay.

A representation of the region's rich agrarian history.

The original attack periscope from a 1940s navy submarine towers high at this memorial site.

This work of public art symbolizes the maritime history and the modern creative industry in Fremantle.

Hundreds of people walk past this palm tree every day without spotting its secret.

An engineering masterpiece, or “Scheme of Madness?”

This 1800s former railway tunnel is now part of a heritage walking trail.

Home to one man's collection detailing the history of photography.

An abandoned marine theme park has created a difficult experiment in dolphin rewilding.

The world's "leaniest" tower encourages you to test the gravity of its situation.

A stray meteor left this picturesque hole in the Australian outback.

A massive concentration of algae is responsible for this lake's pink hue.

Critics argue this boab tree has been mislabeled for the sake of dark tourism, undermining its spiritual significance.

Microscopic fossils suggest Australia may be the birthplace of sulphur-based life forms.

A town whose main resource was blue asbestos... what could possibly go wrong?