Annandale is situated within the Accotink Creek watershed, which provides vital natural drainage and scenic beauty to the area.
* **Accotink Creek**: This picturesque stream winds its way through Annandale, bordered by protected parklands and running adjacent to the Cross County Trail. * **Lake Accotink**: Located just south of Annandale in neighboring Springfield, this 55-acre man-made lake is fed by Accotink Creek and is a popular spot for kayaking, pedal boating, and fishing.