How to get here:
https://www.desy.de/about_desy/getting_there/hamburg/index_eng.html
You can no longer buy the bus tickets on the bus. The best option is via hvv app
https://www.hvv.de/en/service/hvv-apps
Here you can find more information on public transport tickets in Hamburg:
https://www.hvv.de/en/tickets/single-day-tickets
Public transport prepaid hvv card:
https://www.hvv.de/en/prepaidcard
