A historic observatory precariously perched at the "Top of Europe."

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

Eighteenth-century home, where Herschel discovered the planet Uranus.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

Drink wine handed out through a window as part of an age-old tradition.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

One of the oldest seagoing boats in the world can be found at the Dover Museum.

This ancient Bedfordshire church was abandoned when the village's population slowly began migrating to new towns.

This award-winning men's bathroom was just too beautiful to not allow women to see.

A palatial art deco restroom.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

A medieval stronghold rising over the ruins of ancient Roman villas along Rome's southern coast.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

This military mausoleum captures the solemn grandeur that most memorials only aspire to.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

A submerged archeological park still holds the wonders of a Roman Sodom.

A 16th-century horror show built in a lovely Italian garden.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.