The only retired U.S. nuclear missile silo that is open to the public.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

A floating cat sanctuary on an Amsterdam canal.

These red marks, seemingly placed at random, are in fact not.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The taxidermy remains of the most popular pony in children's literature.

This colossal war machine is now a living museum dedicated to underwater warfare.

This historic train station has been converted to a locomotive themed hotel.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

The maritime museum that boasts the largest nautical library in the western hemisphere.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

A Hawaiian stairway to heaven—that you can't climb.

This Federal-style plantation house was once visited by Abraham Lincoln to meet with generals during the Civil War.

The hide of Stonewall Jackson's equine sidekick is on display not far from where the ashes of his bones are buried.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The romance of early commercial flight still fills this Art Deco destination.

At 207 feet, one of the world's longest continuous escalators.

This replica of the Greek structure is in the heart of Nashville.