Natural Area Caledon is a state park located in King George County, Virginia, not in Maryland. It is situated on the Potomac River and is well-known for its bald eagle nesting population. Visitors can enjoy hiking and bird watching in the park, as well as kayaking and fishing in the river. The park also features an interpretive center and exhibits about the natural and cultural history of the area. The best time to visit is during the spring and fall, when the weather is mild and the bird migration is in full swing.