The last funhouse of its kind, where guests enter through the mouth of an 80-year-old blue whale.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Take a step into the workshop where Edison and his employees revolutionized the world.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

A billionaire heiress' menagerie of animals were lovingly laid to rest on the grounds of her former estate.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Metal dinosaurs lurk in a sculpture garden on the outskirts of a popular resort town.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

One of the largest trees of its kind in California.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

This symbol of peace is appropriately positioned overlooking the Pacific Ocean.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This small-town pizzeria won the Hollywood lottery.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The land is home to swimming ponies and a legendary 18th-century treasure.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.