A walk through the historic city center, under the streets of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

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

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.

The first declared National Monument in the United States.

A maritime museum holding the remains of Blackbeard's pirate ship.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Curios, scientific antiques, oddities for sale.

This museum offers an actual time machine back through Colorado's past.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

This iconic science fiction house still looks like something from the future.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

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

27-room home built with the fortune of a sugar magnate.

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

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.