A network of underground water channels that dates back to the Middle Ages.

A remnant of the Roman army's presence on the coast of Scotland.

Though an earthquake destroyed this village in 1980, one former resident still walks its streets every day.

For decades, a bottle factory dumped their waste into these waters—now it's considered the best sea glass beach in England.

These ancient rock graves were featured on the cover of a Black Sabbath compilation album.

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

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

This temple was constructed entirely by Roman soldiers.

One of ancient Etruria's most spectacular archaeological sites with impressive necropolises and rugged landscape.

An architectural gem nestled into a promontory overlooking a prehistoric landscape.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

This Roman archeological site is hidden amid a 1930s housing estate.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

On the outskirts of the small village, an abandoned grassy field glitters thanks to the white stones of an ancient structure.

Now home to a drinking establishment, this building has a macabre history.

An architectural marvel that dates back to the zenith of Indian architecture.

The ruins of a thousand-year-old hermitage are tucked away deep in the sloping forests of Albano Lake.

These mysterious 1,000-year-old walls have revealed little about their past.

These overlooked ruins give an intimate look at the Inca Empire's urban planning prowess.

This abandoned racetrack looks like it is set to hold competitions in the apocalypse.

Experience this Iron Age village the way that its original residents would have.

Chiseled out of a sandstone cliff, one farmer's unfinished art project lies in ruins.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

Passengers are not allowed to set foot outside this station, but you can still enjoy spectacular views of the sea from the platform.