This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Thousands of turbines whir at at the origin of North American wind power.

This small monument to the great inventor contains a time capsule and a Wi-Fi hotspot.

This contorting sculpture is the tallest in San Francisco.

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

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

Only hotel where you can legally launder money.

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

An alley covered with 20 years of bubble gum.

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

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

One of few lasting examples of the brief octagon craze that developed into folly.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

A man-made island in scenic San Francisco Bay.

A deserted hodgepodge of experimental structures designed by nearby university students.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

A promotional sun clock on the site of San Francisco's great raceway.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.