This cache is not at the posted coordinates. Groundspeak has released a limited number of Geocaching Adventure Lab credits to various geocaching organizations and individuals around the world and I was lucky enough to have been chosen. These new adventures are similar to the “lab caches” available at megas but will be in place for a much longer time, perhaps even permanently.

To learn the coordinates for this geocache you must complete the Historic Fort Washington Adventure Lab that is nearby and collect clues that will be displayed after you answer each question. N038° 42. ABC W077° 0D.EFG.

Admission to Fort Washington National Park is FREE. 

The Visitor Center and Historic Fort are ONLY open Thursday through Sunday, 9:00 am - 4:30 pm.

The park grounds are open 8:00-sunset at all times.

Closed January 1, Thanksgiving, and December 25.

This cache is placed outside the park itself. 

Built to defend the river approach to  Washington, DC, Fort Washington has stood as silent sentry for over 200 years. As technologies advanced so did Fort Washington, from the brick and stone of the 19th century to the concrete and steel of the 20th century.  Joining the National Park Service in 1946, the park continues to protect the Potomac River.

Please share in your log any photos that you take while visiting Fort Washington.

You will need to download the Adventure Lab app to find and log these Lab Caches.

Download the Adventure Labs App

Geocaching Adventure Lab app FAQ

How to access the Historic Fort Washington Adventure Lab:

Mobile app smart link

Use your phone's native QR code scanner to open this adventure in the Adventure Lab mobile app, or share the following URL:
https://labs.geocaching.com/goto/FortWashington

Adventure Labs Approved by National Park Service Park Ranger
Barbara L. Wadding