There are twelve rental cottages on the Potomac River in Algonkian Regional Park. They are equipped with full kitchens, linens, TVs, etc. and are great for family vacations, church retreats, or weekend getaways from the city.
When you stay in a cottage, you receive free admission to the water park and deluxe mini golf course as well as discounted 18-hole golf.
A couple of the cottages have hot tubs on their decks. For pics, see: http://www.nvrpa.org/shosihouse.html.
There are excellent birdwatching opportunities from each cottage's riverfront deck and along the nature trails throughout the park.