"D.C.’s iconic Washington Hilton hotel opens its heated rooftop pool to the public with a seasonal swim and gym membership ($1,500) that runs through Halloween. The refreshed pool deck, with new lounge chairs and unobstructed views of the Washington Monument, invites swimmers from 6 a.m. to 10 p.m. daily. All hotel guests have full access to the seasonal pool and health club with yoga classes. Summer cocktails include zero-proof mocktails and a coconut water highball." - Tierney Plumb