This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

The longest and widest floating bridge in the world.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

This Puget Sound military post has a long, turbulent history as a gateway to the Pacific.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

A 1940's shrine dedicated to drowned fishermen on the outskirts of Honolulu.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

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

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

Only hotel where you can legally launder money.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

Faceless white figures loom over the city from the rooftop.

A man-made island in scenic San Francisco Bay.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.