We had a very cosy weekend at the Sunset Marina. It was very quiet there, hidden at the end of a wooded area yet close to the city. We were easily able to drive a few minutes down the street and take the S Bahn and enjoy Berlin....walking is doable but would take probably 30 minutes to reach the S Bahn on foot. It's a really great option for people who want to enjoy the city but who need the peace and quiet of nature. :)