More than 700 species live within this murky marvel of a swamp on California's coast.

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

Historic funicular railway, believed to be the shortest railroad in the world.

A beautiful memorial tells the story of a formerly enslaved woman whose kindness shaped a burgeoning city.

A living time capsule of the 1960s Richardson Bay water-front.

The mysterious round rocks of Schooner Gulch.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

An Aladdin's cave of old Silicon Valley tech.

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

Frida Kahlo's childhood home, now a museum of her life and works.

An artisanal toy-maker’s works are highlighted in this museum dedicated to the craft of toys.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The unusual patterns in this rock formation result from two distinct modes of weathering.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A tunnel with windows, so you don't miss out on the impressive views.

Is there such thing as too many fruit bats? Not anymore.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

Taxidermy of the racing horse with a huge heart, who inspired hope in the Depression.

Once housing children next to hardened criminals this historic jail once displayed Ned Kelly's skull until it was stolen.

An unphotographable nightly march of tens of thousands of "fairy penguins" from sea to shore.