360° views of the city plus five floors of optical illusions and hands-on science.

A 30-acre garden inspired by the principles of modern physics.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

These fantastically named natural pools look like something out of a Scottish myth.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

An ancient stone wall formed by lava that was a frequent stop during funeral marches.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The oldest operating pharmacy in the world features 800-year-old recipes.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.