Private Walking Tours in Berlin. A great way to see Berlin as Berliners really see it. Private Walking tours are great in that you can easily stop by into a store or to browse or even quickly pick something up without having to stop or park the city tour vehicle. OnBoard Berlin walking tours come with a professional, licensed Berlin Tour Guide. You are free to amend the tour itinerary anyway you wish and as always our Berlin Tour Guides will be pleased to to fulfill your special wishes. Our Berlin walking tour itineraries are great to reveal the city in all its diversity, history, present and culture. Book a cultural and historical Berlin city walking tour.