Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

An 18th-century lighthouse built on a 16th-century castle is now a monument to the maritime beacons of Scotland.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

A baffling beast so absurd a town councilman called it "intellectual vomit in technicolor."

The location of this historic castle was inspired by a donkey.

The remains of an anti-aircraft battery from World War II look out over Glasgow.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A retirement home for soldiers that can trace its history to the Elizabethan era and beyond.

A brutalist gem towering over the heart of Milan.

A roadway designed for a visiting monarch.

A Reformation-era fiery figurehead once denoted this location as a print shop.

Hidden in plain sight, this creepy sculpture watches from above.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

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

Perhaps the most spectacular grotto along the Algarve coastline.

One of the world's tallest flagpoles.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

Vibrant paintings stretch across 600 feet of derelict railway.

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 little-known national museum houses over 40,000 works of art from across the world.

The former stronghold of the Malla Dynasty has remained virtually unchanged since the 17th century.

Apartment building was once posh playground to the Hollywood elite.

A lonely Gondola stuck on a traffic circle sits in a spot where it once would have floated down the Grand Canal.