A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

Designed to honor all those that work as nurses around the globe.

This supermarket is suspended 25 feet above an interstate highway.

The world's largest piece of copyrighted artwork.

This site commemorates the former inn and restaurant where the chocolate chip cookie was first crafted.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

These cabins mark the site where our 11th president was born (probably).

A Christian-themed amusement park and complex rocked by scandals.

A replica of where the Last Supper was held.

The ruins of a 19th-century mill are hidden along a greenway in a prominent Charlotte neighborhood.

These strange large stones served as a campsite and lookout post for generations of Native Americans.