There is a large lake that I saw yachts and small craft on but I didn't see anyone swimming or sunbathing. Not sure if its allowed.

I was on a private tour with a German friend of mine and I didn't see any guided tours or audio items available although if you go to the website, you can find an answer. Most of the displays are documents and pictures.The house itself is beautiful as is the back of the house which faces the lake. It's a worthwhile tour and chilling what took place there.

We got to wansee by train and a cab from the station. We took a bus back to the station and returned by train. The trains run frequently. You could spend from an hour to 3 to 4 hours depending on how much detail you wish to take in

Take the S-bahn (S7 direction Potsdam from Berlin Hbf or S1 from Potsdamerplatz) to the Wannsee stop. On the lake side of the street above, catch the 114 bus towards Hackeshorn. Get out at the Am Grossen Wannsee stop. From there it's a brief walk. If you purchase a ticket for the A&B zones, you should be covered. Or consider an A&B day ticket for the trip back and any other sides trips in the A&B zone that day. It's worth it.

I don´t think you´ll need a guide - the museum is quite small, almost self explanatory, and as far as I recall youl´ll find alla signs and texts in english as well as german.

Hi 20 different languages. Including Hebrew and of course English. All, very clear and cordial. Don't miss this experience, you won't regret it. open daily, including Sundays during daytime. Check out in their Website for exact opening hours. good luck my friend. contact me if you need anything.