Walking Tours
Daily walking tours are offered by Insider Tour (tel: (030) 692 3149; website: www.insidertour.com). Walking tours start from the McDonalds opposite Bahnhof Zoo, at 1000 and 1430 (April to October) and at 1000 only (November to March). These take between three and four hours to complete. All the major sites, such as the Victory Column, Brandenburg Gate, Potsdamer Platz and the Reichstag, are covered. Insider Tour also offers cycling tours with a similar itinerary from May to September. Original Berlin Walks (tel: (030) 301 9194; website: www.berlinwalks.de) has five different tours, including three in the city centre. Their 'Jewish Life in Berlin' tour runs May to September on Mondays at 1000 from Meeting Point West. The tour lasts three hours. Free walking tours are offered by New Berlin Tours (tel: (030) 5105 0030; website: www.newberlintours.com) who use local students to act as guides on a tips only basis. Tours start daily at 1100 and 1300  in front of Starbucks by the Brandenburg Gate and at 1030 and 1230 in front of Dunkin' Donuts by the Zoologischer Garten.

Bus Tours
A cheap and simple way for visitors to see the sights in Berlin is to board bus 100 (see Getting Around) as the bus journeys from the centre of West Berlin to the East, travelling through the Tiergarten and passing the Reichstag and Brandenburg Gate. A similar tour is possible on bus 200, which passes through Potsdamer Platz rather than the Tiergarten. However, buses in Berlin get very busy and you cannot be assured of a seat.

Guided bus tours are available from a number of companies, which are significantly more expensive for a hop-on, hop-off tour - the summertime (April to October) option can include a one-hour boat tour on the Spree. There are a number of pick-up points along the Ku'damm, between the Europa-Center and Uhlandstrasse. In City West, the best departure point is in front of the large department store, Kaufhas des Westens (KaDeWe), while in the City East, buses stop at the Brandenburg Gate (in front of the Café Meyerbeer) and at Alexanderplatz (in front of the Hotel Park Inn). Operators include Berolina (tel: (030) 8856 8030; website: www.berolina-berlin.com), tours daily 1000 to 1800; Berlin City Tour (tel (030) 6830 2641; website: www.berlin-city-tour.de), daily 1000 to 1630; and Tempelhofer Reisen (tel: (030) 752 3061; website: www.tempelhofer.de), daily 1015 to 1810.

Other Tours
Walking tours of Berlin's architecture, neighbourhoods and a variety of cultural institutions off the regular tourist trail are available from Berlin Guide (tel: (030) 2067 3987; website: www.berlinguide.biz), which offers various historical walking tours. The general history tour runs daily at 1000 and starts from Lustgarten. The tour lasts three hours. Individual walking tours on various themes, including 'Jewish Berlin', are offered by Berlin Tour and Guide (tel: (030) 6130 5861; website: www.berlin-tour-and-guide.de). Guides will come and meet you, tours last around two to three hours, prices on application.

Trabi Safari (tel: (030) 2759 2273; website: www.trabi-safari.de) runs driving tours in cute Trabants. You drive and the guide gives a commentary through the city. Tours last 90 minutes and run from 1000 to 1800. Pick-up by arrangement.

Fat Tire Bike Tours (tel: (030) 2404 7991; website: www.fattirebiketoursberlin.com) organises guided cylcling tours. There is a basic 'City Tour' and a 'Berlin Wall Tour' - both start from the TV Tower by Alexanderplatz U-Bahn.

Air Service Berlin (tel: (030) 5321 5321; website: www.air-service-berlin.de) runs helicopter tours over the city. Flights leave from Tempelhof airport, last around 15 minutes and take visitors over sights such as the Reichstag and the Brandenburg Gate.