Saturday, September 29th is Field Trip Day in many cities, including New York, where urban explorers and history buffs will gather around for an adventure in the untouched and exotic neighborhood of... Greenpoint? The organizers write:

"Drift with us through the culture and history of Greenpoint, Brooklyn, a tucked away neighborhood sculpted by its maritime and industrial past. Field Trip day is dedicated to the art of the wander, and discovery through exploration. Come and see Greenpoint for the first time or with new eyes... Discover where colored pencils came from, get up close and personal with one of the most polluted waterways in the US, and take down your opponents in a dramatic restaging of a Civil War ironclad battle! Together we'll find hidden places, discover secret histories, and learn skills long forgotten."

Is this all in the name of something so pure and simple like a field trip? Of course not, Field Trip Day is really the launch day of the Field Trip app. But if the app includes more hidden spots in the city that are much less explored than Greenpoint, it could be worth downloading.

And if you haven't ever been to this Greenpoint place, meet at Transmitter Park at 2 p.m. on the 29th to check in— on your journey you'll "learn how to tie nautical knots, launch miniature boats to explore the sludge of the Newtown Creek, solve the riddle of the two-faced jewelers clock, interview 1880's oil industry workers, and play with electricity under the guidance of the inventor who sealed Edison's fame..." okay, that sounds pretty cool. Plus, at 6 p.m. they'll be hosting a party at the Brooklyn Rail Offices (99 Commercial Street)—sign up here.