Located at the juncture of the National Gallery's two wings, the Cascade offers views of just that: a shimmering, IM Pei–designed artificial waterfall. The cafeteria-style eatery is divided into different stations where you pick up a tray and choose among pizza, pasta, sandwiches, barbecue and salads. The adjoining espresso bar scoops 19 flavors of gelato.

It’s a lovely place for a quick bite, and a big family favorite given the sweet treats on offer.