When you mention Marriott, you never think of a ranch.
But in Hume Va. just a short trip from DC is The Marriott Ranch. This was purchased by Mr. Marriott Sr. and his wife and is an actural ranch with livestock and over 4300 acres to roam. Situated in a valley and near some great wineries to visit. The main house is historical and now a B and B . Also outside buildings that are also relaxing places to stay.
Networking events and team building are fun events here.
I visit once a year to just veg out and relax. Look it up as it has it's own web site.