This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.

The history of this futuristic crypt-turned-temple is as curious as its facade.

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.

A fairy tale castle in modern Rome.

The 20th-century archaeologist was interred among the ruins of an ancient Roman city.

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

It's a mystery how these curious columns wound up in an Edinburgh suburb.

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

The surviving remnants of a destroyed medieval church now stand in a public park.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

An atmospheric, medieval-themed book store hides in a 13th-century underground space.

What was once the longest suspension bridge in Latin America was directly inspired by the iconic Brooklyn Bridge.

This haunting sculpture was created as a statement on the mechanized warfare of the First World War.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

Public art now takes pride of place on the site of one of County Durham's last deep coal mines.

The scene of the United Kingdom's most famous UFO incident, dubbed the "British Roswell."

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

The grave of the legendary "Bonzo" can often be seen covered in cymbals and drumsticks.

This gorgeous, colorful 18th-century church is part of one of Bolivia's few surviving Jesuit missions.

These naturally occurring but rare geological formations are each about the size of a small house.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

A face emerges from the landscape when seen from the air.

An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.