A small obelisk commemorates the launch site of the world's first liquid-fueled rocket.

A blacklight journey through a celestial art exhibit.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

An abandoned observatory in the middle of the Illinois prairie.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

A tree grown from astronaut seeds which were exposed to cosmic rays.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

This American Sycamore was grown from seeds that accompanied the Apollo 14 mission in 1971.

This mysterious artificial cave has long puzzled New Englanders.

The only surviving building of historic West Boylston, which was flooded to create the Wachusett Reservoir.

This railroad tunnel was once the longest in Massachusetts.

The gravestone of the man who designed the plastic pink flamingo is adorned with his most famous creation.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

This classic red schoolhouse is said to have been where Mary and her little lamb went to school.

The oldest continuously-operated inn in the United States, once owned by Henry Ford.

This general store near Boston was once owned by Henry Ford, who had it relocated to a different town using a team of oxen.

This dam in the woods, built by Henry Ford with only manpower and oxen, holds no water and serves no purpose.

A historic bridge no one is allowed to cross.

This location holds the truth to what truly happened that faithful night.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

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

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

No one really knows how these old hobby horses got here, but the herd keeps growing.