Oldest Protestant church in the Middle East, designed to resemble a synagogue.

Dedicated to the untimely death of American balloonist and parachutist.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

A sulfuric hellscape in southern Italy.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

A concrete mushroom that divided Stockholm residents for nearly a century.

This one has sailed five times as far as Sir Francis Drake's famous ship.

An incarceration museum on the spot of possibly the oldest prison in England.

Murals of the wild parties once held on the frozen River Thames.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

The London statue that imitates passersby.

This South London cemetery holds the remains of more than 15,000 people.

Tourists who rely on a transit map to find the iconic Beatles location often end up in a far-off neighborhood.

This sculpture, residing in a quiet corner of a London park, honors the victims of 9/11.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

A unique sculpture calls the outside of this steakhouse home.

A medieval setting reimagined into a unique art alley.

A whimsical art tower at a Bavarian brewery includes a grotto for its mythical beer-brewing dwarves.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

Nestled within a German forest is an intriguing, growing rock.