Mentioned by Where Are Those Morgans?
67 Best Things To Do In New York City: Free, Cheap & Top Attractions
"Once a revolutionary war military installation, Governors Island today is a public green space floating in Hudson Bay, perfect for tourists to explore in warmer months. The US army and coastguard have both used Governors Island for training purposes but it was ultimately opened to the public in 2005. Here’s what you need to know:"