This grand stone tower was dedicated to a famed American humorist almost by coincidence.

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

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A hollow cement depiction of time's inexorable effect on the human body.

A historical home in upstate New York honors the work of John W. Jones, a formerly enslaved man who was a major agent for the Underground Railroad.

All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

The little-known final resting place of one of America's greatest writers.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

An exotic wildlife habitat right off The Strip.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

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

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

A 131-year-old wunderkammer of Texas history.

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

A 2,500-pound wooden nickel makes this woodworking museum easy to spot from the road.