A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A historic landmark and museum filled with curious objects representing the history of Key West.

The world-record holder for the longest bridge stretching continuously over water.

The record holder for the world’s largest peach.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

St. Augustine's record-setting narrow street was designed to protect against pirates.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

Mile-long cave system near Great Smoky Mountains.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This kitschy tavern is also home to rare early editions of "Treasure Island."

A statue honoring 44 continuous years of greeting passing ships.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.