This lake in the Cascades lives up to its name, disappearing down a hole every spring.

A volcanic fissure over two miles long and up to 70 feet deep.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The highest bridge in America was built for an almost unnervingly small amount of money.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

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

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

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

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

The world's tallest statue of an American hero.

A tiny waterway named after a ghost story.

This memorial marks the devastating day that Texas City was destroyed in a daisy chain of exploding ships.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

Three hundred years of preserved Spanish colonial history in San Antonio.

The Grand Canyon of Texas.

A private collection of massive steel monsters guarding a Texas pipe works.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The first Russian Orthodox church in North America and an Alaskan landmark.

Low tide reveals 8,000-year-old rock carvings in Southern Alaska.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.