Secure and affordable parking at the International Square in downtown, Washington, D.C. Just a short walk to the Lisner Auditorium, Jack Morton Auditorium, and Charles E. Smith Athletic Center. Max Vehicle Height: 6'5" If parking overnight, you must drop off and pick up your vehicle within the following hours: Mon-Fri 6:00am - 11:00pm, Saturday 10:00am - 11:00pm and Sunday 8:00am - 8:00pm. The 18th Street entrance will be closed at 7 pm Monday through Friday till further notice.