My choice is beach. Rehoboth Beach in Washington DC is one of my favourite beach that I have travelled.....
https://travellifo.com/14-best-beaches-near-washington-d-c/
You may take advantage of day trips and overnight beach vacations if you go to Rehoboth Beach. because there are many attractions and a historic boardwalk along the beach. From Washington, it will take 2.5 hours to get there. Restaurants, candy stores, and gift shops abound on the Boardwalk. In addition, Funland amusement park and Beach Arcade are located there. A carousel, vintage bumper cars, several thrill rides for the more daring youngsters, spinning teacups, and other amusements may be found at Funland.