This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

Two gushing waterfalls of hot spring water within a block of each other.

The arch that celebrated the completion of the Lincoln and Victory highways.

San Francisco's newly reopened hands-on science museum.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

The largest single-building tribal cultural center in the U.S. is an expansive museum in Oklahoma City.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

Canyon walls shrouded in ferns.

A trash dump made beautiful by nature's power.

This massive redwood tree has a hole in the base big enough to drive through.

An optical illusion found amid a logged redwood forest.

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

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

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

Folk art crafted from discarded vegetable crates.

A simple plaque remembers a California island massacre that claimed more than 100 lives.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

Bronze statue marks the spinach capital of the world.