This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

A modern mechanical planetary system, part of a 10,000 year clock.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

Visible below the waves are memorials to the city's Gold Rush dead.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

A psychedelic labyrinth on the San Francisco bay.

An artsy hidden staircase leads to breathtaking views of San Francisco.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

Lavish royal estate punctuated with heated greenhouses.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

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

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

Walk over a 150 year old manhole.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

Manhattan and the Bronx have been playing tug-of-war over this former island neighborhood for more than a century.

Come for the waffles, stay for more waffles.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.