RIO Washingtonian Center, stylized as rio, is a 760,000 sq ft (71,000 m2) hybrid power center and lifestyle center with shopping, restaurants, and entertainment in Gaithersburg, Maryland located immediately south of the interchange between Interstate 270 and 370. The original RIO building opened in 1982, while the adjacent "Washingtonian Center" and "Washingtonian Waterfront" were developed in 1997 and 2004. It underwent a $30 million renovation in 2020. The center is adjacent to the U.S. headquarters for Sodexo and four Marriott-branded hotels.
A two-lane imitation "main street" with small shops and parking garages is anchored by four big-box stores:
An adjacent artificial 9-acre lake featuring additional restaurants, hotels, a carousel, and paddle boats is anchored by AMC "Dine-In" Theaters.
- Al Urbanski (May 12, 2020). "Retail center owner in D.C. readies re-opening plan". Chain Store Age.
- "Peterson hits refresh on MoCo shopping center with $30M facelift. And Silver Diner's along for the ride". www.bizjournals.com. Washington Business Journal. Retrieved 27 March 2022.
- "About Us", rio website
- "Silver Diner to Join Gaithersburg's RIO Washingtonian Center as Part of $30 Million Redevelopment". Bethesda Magazine. 2 October 2018.