On our first date (which wasn't really supposed to be a date), Matt and I went dancing at Glen Echo. It wasn't long before we were sitting out more dances than we were dancing...we walked around the grounds and ended up sitting for hours on a bench down by the glass studio, overlooking the creek there. If you're ever at Glen Echo, wander down there and sit a minute for us.
Go rock scrambling at Great Falls on the Maryland side. Go off the path and climb up on top of one of those giant cliffs. Sit under a grove of wind-tossed little pines and watch the waterfall thundering far below. Secluded spot and sweeping vista!
Bon Air Park Memorial Rose Garden - Ballston, VA - in May. http://www.arlingtonvirginia.com/experience/must-see3
when I was dating I took several ppl on the hike up Old Rag. tells you a lot about someone to go an a challenging hike with them...and at the top you're on top of the world...and you feel like you accomplished something together. my current partner passed that test with flying colors...
Wow, I've never been to the Rose Garden (will have to check it out this May) but the others on this list are all beautiful! Keep 'em coming...
Fletcher's Boathouse has a wide "lawn" on the Potomac. We went there in late August on a weekday and it was deserted. So we fooled around. i suppose one could be arrested for indecent exposure. It's tough to find places that secluded. On a quiet day, you could hike the Billy Goat Trail and reach that little "beach" but bear in mind it requires a fair bit of strenuous hiking. Rock Creek park's picnic areas are nice.