Castles? In New York? Why, yes! These ruins are a must, built by the Bannerman family as warehouse facility for their military surplus business in 1901. Get there by boat or kayak, tours available. Read more.
This is the largest legal aerosol exhibit in the US, possibly the world. It was founded in '93 as a haven for aerosol artists to hone and showcase their craft. See more: Read more.