Washington D.C. has many parking options available for visitors who need to park their cars for a few days. Here are some options you can consider:

Parking Garages: There are many parking garages located throughout the city, which provide secure and covered parking. These garages usually charge an hourly rate, and many offer daily or weekly rates for extended stays. You can find a list of parking garages in Washington D.C. on websites such as ParkWhiz, SpotHero, or BestParking.

Street Parking: Street parking is available in Washington D.C. but can be challenging to find in busy areas. You can park for a maximum of two hours at a time on most streets, and parking meters must be paid during specific hours. However, you can park on the street for free on Sundays and certain holidays. Be sure to read the signs carefully to avoid parking violations.

Park and Ride Lots: If you are staying outside of the city center, you can park your car in one of the Park and Ride lots located on the outskirts of the city. These lots offer affordable long-term parking, and you can use public transportation such as the Metro to get to the city center.

Hotel Parking: If you are staying in a hotel, you can check if they offer parking for their guests. Many hotels provide their guests with free or discounted parking, and you can leave your car there for the duration of your stay.

It's important to do some research and planning ahead of time to find the best parking option for your needs and budget. Be sure to check the parking rates, hours of operation, and any parking restrictions before leaving your car.