An architect transformed this abandoned cement factory into his castle-like workshop.

This semi-secret storybook hedge maze is also the oldest garden in the city.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A beautiful but toxic fountain of mercury.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Week-long block party becomes a competition for the best decorated street.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

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

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Deep scars on the earth left by the Ice Age.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

The largest guitar store in the world has been visited by some of music's all-time greats passing through upstate New York.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

This dramatic rail curve was once the target of a failed Nazi attack.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

A historic covered bridge is but one example of an oddly prevalent American urban legend.

An outlandish shoe shaped house built by an eccentric millionaire.

The oldest farmer's market in America is so ancient it was approved by the King of England.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.