- RISE Demonstration Center
- 2730 Martin Luther King Jr. Ave. SE, Washington, DC
- River Road Unitarian Church
- 6301 River Rd., Bethesda, MD
- Robert Harper Books
- 6216 Rhode Island Ave., Riverdale Park, MD
- Rock Creek Nature Center
- 5200 Glover Rd. NW, Washington, DC
- Rock Creek Nature Center
- 5200 Glover Rd. NW, Washington, DC
- Rock Creek Nature Center
- 5200 Glover Rd. NW, Washington, DC
- Rock Creek Nature Center, Planetarium
- 5200 Glover Rd. NW, Washington, DC
- Rock Creek Park Nature Center
- 5200 Glover Rd. NW, Washington, DC
- Rockville Memorial Library
- 21 Maryland Ave., Rockville, MD
- Room & Board
- 1840 14th St. NW, Washington, DC
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