A bizarre roadside attraction and the first instance of miniature golf in the world.

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

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The first declared National Monument in the United States.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Crumbling hotel echoes with the sounds of the '30s.

The end of times arrives, at least for the fish in the O.C. Fisher Reservoir.

Numerical symbolism abound at East Asia's oldest observatory.

Secret North Korean passage discovered below the world's most dangerous border.

Home to more than 13,000 pieces of war memorabilia and military equipment.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Ming Dynasty necropolis raided during the Cultural Revolution.

The once highest point in China blends symbolic design with a kick of adrenaline.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

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

An 18th-century Spanish watchtower made entirely of seashell and concrete.