The apartment is located at the river Elbe in the "Altes Land", west of Hamburg.
By car you'd use exit "Stade Ost", direction Drochtersen/Wischhafen, take the first right to enter Hollern-Twielenfleth after about one kilometer.
Now turn left anytime towards the river and as soon as you are at the dike look for number 27.
The apartment can easily be reached by public transport aswell: There's a bus at the Stade trainstation (line 2357) direction "Cranz" - it takes about 15 Minutes to get to the stop "Twielenfleth Freibad"
In the morning busses might not stop here, be sure to check:
Fahrplan Stade - Twielenfleth - Cranz