Pedestrian tours are usually slightly more expensive, ranging from 30 to 400 EUR (the larger the group, the more cost-effective it is), but they offer a more immersive experience of the city.
Bus tours
In Berlin typically cost around 20-30 EUR, and you can purchase tickets from the tour bus driver (for example, City Circle Tour, which starts the tours from the Station Square). The advantage of bus tours is the opportunity to hop on and off at various stops, explore specific landmarks in more detail, and then board the next available bus. Additionally, audio guides are usually available in English.
Thematic tours
For instance, "Berlin Parks" or "Berlin Palaces," allow you to explore specific aspects of the city in 3-4 hours. You'll have the opportunity to visit places like Peacock Island, Charlottenburg Palace, and other picturesque locations in Berlin. These tours focus on specific themes or attractions, providing a more in-depth exploration of the selected topic within a shorter time frame.
A very popular tour is "Dungeons of Berlin", or Berliner Unterwelten, you will be guided through abandoned bomb shelters, catacombs and bunkers. The average cost of such excursions in Berlin is 140-250 EUR.
English guides in Berlin
An additional plus is that many excursions in Berlin are conducted by English-speaking guides, so there will be no problems with the language.