walking tour around Berlin?

Hello, folks. I am planning a trip to Germany next week. I was thinking to start my trip with Berlin. I will be there couple of days and I was thinking of having one those walking tours around Berlin. Could you tell me something more about it? Thanks in advance, guys.

Hi to you too. I guess that all of those tours have the main sights in Berlin on their program. I liked Grunewald. It is the largest forest in the city limits and it is excellent for walking. You could see Sanssouci. It is a royal palace and it reminded me on Versailles. New Berlin Tours offer you some interesting tours for sightseeing. There is an intriguing tour called The Insider. It takes 4 hours of walking. It covers all the places that are connected with Hitler. I hope you will like my suggestions. Have a great time there!