Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

A mysterious castle built as a monument to lost love.

A monument to the art of slicing people open.

Massive still life just off the highway in Kansas.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Step inside Lucy, the world's largest "elephant."

This erect, phallic geological spire wasn't always named so domestically.

The only road through the heart of Glacier National Park.

This museum collects over a century of automobile history including the iconic car from The Muppet Movie.

This elaborate towering structure was once famed for its revolutionary height.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Dr Barnes' $25 billion private collection of art and arboretum.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

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

Bouncing, delightful, mechanical art at the MIT Museum.