Ever hear of the Milazzo Cage?

Art Deco urban decay at this historical building.

This hollow steel globe is the second-largest in the world.

Built in 1981 in collaboration with Andy Warhol, this giant piece of pop art stands on the campus of Colorado State University.

A charming monument to a very special dog.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

This historic mansion was built as a symbol of love between a husband and wife.

This functioning mill was built in the 1970s using parts from several other West Virginia mills.

True to its name, this little house presents like a dollhouse, and surprising details are revealed with a quick peek through the window.

The only recreation of William Shakespeare's indoor playhouse.

Out of a desire to feed hungry soldiers, a franchise-altering idea was born.

Thousands of tiny squares in different colors make up this piece of street art.

The upstairs museum delves into the Lawson family murder, whose eight victims were embalmed at this store in 1929.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.

After being inoperative for over half a century, this elaborate fountain in Atlanta's oldest park was restored to its former glory.

The tallest waterfall in West Virginia.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

The world's largest fully steerable radio telescope.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

These pink granite water slides are the result of millions of years of erosion.

A mountaintop space observatory that is certified dark.

This tower was once used to create ammunition for early settlers.

Three bridges and one giant canyon make up this fantastic Spanish settlement.