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.

A world-class collection of mechanical musical instruments and automata.

This tiny structure was built by the creator of the Brooklyn Bridge.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.

This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

A working metal shop and venue for outrageous art and music shows in a former cannonball factory.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

Avoid gangster interaction while window-shopping.

They call buildings like this "mimetic architecture," but nothing has ever mimicked the taste of Moxie.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

The historic home still shows the scars from a little run-in with the British in 1813.

These commemorative stones honor a young woman born in captivity.