Hillwood Estate, Museum & Gardens, Washington, DC
There are a zillion amazing venues in DC so the folks at the CVB didn’t even try to pick the best but instead sent me a long list and essentially said… “you choose”. Since there are so many obvious ones (see the Smithsonian), so I picked one you may not yet be familiar with… it’s for smaller groups, but if you can fit, it looks amazing.
Founded by Marjorie Merriweather Post, Hillwood is set on 25 acres of gardens and woodlands in northwest DC and includes one of the premier art collector’s museums in the US. The largest indoor dining room only holds 40 (max), but there is a lot of other stuff going on. Check it out too. https://www.hillwoodmuseum.org