1) Patapsco Valley State Park
6 Great Swimming Holes Near Washington, DC - Washingtonian
Took this up on Chimney Rock at Catoctin Mountain Park in Maryland. Stellar day and a great hike/climb. Photo by C.A. Smith
Deep Creek Lake State Park The grand lake in Garrett County is only one of the features of Deep Creek State Park. This park is a popular location for water sports, fishing, and mountain biking.
1. Splash Mountain Water Park, Ocean City
Kilgore Falls - The Second Tallest Falls in Maryland Photo
2. Appalachian Trail These 12 Hiking Spots In Maryland Are Completely Out Of This World by Jamie Alvarenga
Cunningham Falls State Park, MD I think I want to go here for Senior Week, more to do than Caledonia.
Easy one-mile loop hike to a waterfall, and then play on the beautiful beach at Cunningham Falls State Park in Maryland.
Top 10 Things to Do in the Washington, DC Capital Region: Take a Hike at Great Falls Park