Public parking is very expensive in Washington DC. If you’re visiting for a few days, hotels will charge up to +50 USD for overnight parking. Parking options are very limited, but there are alternative parking lots which will help you to save your money. You can use the Greenbelt, Franconia-Springfield, and Huntington. Almost 17 spaces are available at each station for 10 days on first-come, first-serveed basis. Officially New Carrollton Metro Station does not allow overnight car parking and there is a risk of being ticketed or towed if you leave your car overnight there.