Once you rent a car at the Warsaw Airport you will be able to see the city's best sites with ease. Be sure to visit the Warsaw old town, which was beautifully reconstructed after World War II and offers sites such as the Royal Castle, King Zygmunt's Column, the Market Square, and the Barbican. Make sure to take a stroll through the Saxon Gardens, Warsaw's oldest public park. When you've had enough of the city, get in your rent a car and drive to Zegrzynski Lake, a popular summer destination where you can catch up on your sailing, fishing and sunbathing. There is a lot to see, so jump in your SIXT rent a car and off you go!