Banksy gives themself artistic license with this piece of London street art.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Repository for more than 22 million pickled specimens.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

This luxury shopping lane has been protected by its own tiny police force for over a century.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Museum dedicated to the terror regimes of Hungary.