The massive machine creates cracking displays of indoor lightning.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

A historic bridge with a lovely acoustic anomaly.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This castle constructed in 1928 was crafted from drawings of Lismore Castle in Ireland.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

This hidden labyrinth offers walkers some brief peace of mind.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

These otherworldly limestone formations jut out from the Kansas prairie.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

Three legendary, living albino buffalo roaming their pastures for all to see.

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

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

A mysterious light in the wood, rumoured to be the the ghost of a railroad brakeman.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

When waves crash onto this section of beach, the rocks sing a song.

This massive roadside mascot was the first version of the giant to illustrate his butt.

One of two giant blue cockerel statues erected with an intentional double meaning.

This lab's maddening silence is good for business but bad for sanity.

Enter the Forest of the Elves.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.