A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

Burping, gurgling geothermal mud pots by the Salton Sea.

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

These pretty kitties killed and ate as many as 135 railway workers.

The famous blue house from the classic horror film "Halloween" is now a local landmark.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

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

Ozymandias’ time-keeping temple.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

One of the most well-preserved temples of ancient Egypt.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

The house where the famed outlaw was shot by a dirty coward is now a museum to the criminal's legacy.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.