This hill nestled in the Scottish lowlands was a ritual site for over 4,000 years.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

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

These ancient sea caves hold Britain's highest concentration of Pictish rock carvings.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

According to Greek mythology, this natural spring is the home of a freshwater nymph.

Italian cave with exceptional acoustics and an unsavory history.

The world's most active stratovolcano is almost always erupting.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Op-art architecture designed for happiness.

The topiary maze at the Habsburg hunting lodge.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

This 42-foot tribute to the workforce still reminds us to pause and recharge.

The most impressive of Basel's three remaining city gates.

Beneath an ancient wishing tree lies an underground chapel with 12th-century frescoes and catacombs dedicated to a lady saint.

This sea stack in Cyprus is traditionally seen as the birthplace of the goddess Aphrodite.

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

A little sculpture with a large wardrobe.