A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

Secret refuge and museum of the Duke of Florence.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

An engraved boulder marks the spot where Patsy Cline's life ended in a plane crash.

You can climb to the summit of Black Mountain, as long as you sign the waiver.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Try not to get slimed in Tribeca.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

The walls and streets of the ancient city are peppered with penises.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

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

Ancient snack bar of the Roman Empire re-opened.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

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

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

In the summer, the area around this sculpture transforms into a vibrant concert venue.

The iconic remains of the original Academic Hall that burned down in 1892.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

Eat a tasty meal in the house where John Steinbeck was born.

The medieval woodcut-style artwork chronicles life in medieval London.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.