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

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

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

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

A vertically floating hemlock controls the waves and weather at Crater Lake.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A tourist attraction founded around a slumping cabin.

Canyon walls shrouded in ferns.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

Commonly referred to as the most photographed Victorian home in the United States.

Humboldt's human-powered sculptures race across land and sea for days on end in a wacky quest for dominance.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

A local dialect born in the late 19th century is only spoken in this isolated California valley.

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.

The southernmost outpost of the Russian Empire in colonial America.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

The largest drain hole in the world.