My partner in crime was in town for half of the week. The weather as you know was pretty miserable so it prevented us from doing a lot of the thins we had planned, but we still managed to have a lot of fun.
We went to GoApe, a zip lining place in Rock Creek Park which I highly recommend! It was a blast! It's only $50 per person for a 2-3 hour event. That sounds like a lot but you really get a great deal. Some places I've done zip lining at are that price for just one and last 5 minutes.
Here you get a handful of zip lines and a bunch of obstacle courses to climb thru. There are different levels depending on your experience and physical ability. It is a work out, I'm still sore a couple days later but so worth it!
Get a good idea for how it works in this video plus how we managed lol.