If you're looking for a day or half-day adventure that will take you off the beaten path of NYC, Governors Island is a great choice. Known mostly to locals, the island has only been open to the public since 2003, and not yet on the tourist radar. It contains two historic forts and a massive, new public park. It's rich with American and New York history, and has served as a military base since the year 1800. In the 21st century the island has been ingeniously reimagined as an innovative public space. It is home to many arts, education, cultural and environmental non-profits who are finding new and exciting ways to use the space. The island is just 172 acres total, with a 2-mile (3.2 km) perimeter, so it's bite-sized. It's many lawns and shade trees beckon you to enjoy a picnic lunch, and the kids will love it. And, as there are no cars allowed, it's the perfect place to enjoy a bike ride.