The United States Capitol dominates the eastern end of the National Mall on Capitol Hill — its dome, completed during the Civil War, is hard to miss. The Capitol is the seat of the United States Congress, and it has been a center of American politics since 1800. Inside, the Visitor Center walks you through its history, shows off its art collection, and explains how the legislative branch works. Free guided tours are available, but booking ahead is a good idea — lines can get long, especially in peak season.

Ses Salines is a long stretch of white sand backed by pine trees and part of a natural park. It’s popular with a younger crowd and has a few beach bars that crank up the music in the afternoons. One end tends to attract nudists, but the vibe overall is relaxed and open.

Right next to the Capitol, the Botanic Garden is a quiet spot with both indoor conservatories and outdoor plots. Inside, you can walk through rainforest and desert environments under glass; outside, there are seasonal displays and a rose garden. It’s not huge, so an hour or so is usually enough, but it’s a nice break from the busier sights on the Mall. Entry is free, and there are programs and exhibits for all ages.