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

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

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

This legendary urban waterfall creates a dazzling display of rainbows.

This black shoreline is made up of exploded lava particles.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

Tiny horses tethered to antique rings are scattered around the city.

A carousel trades in its classic horses and calliope for endangered species, native flora and fauna, and a modern soundtrack.

Watch the newest land on the planet form before your eyes.

"Only the devil could play golf here."

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

The Ozarks' strangest dwelling.

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

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

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

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

The liveliest ghost town in the state.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

One of the most unusual geological features, recognizable from a dozen hit movies.

An architect's childhood fantasy treehouse made real.

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