From Gaia Science Alerts Working Group
Warsaw has two airports operating international flights:
- Chopin: main airport, major airlines, located within the city
- Modlin: cheap airline airport, only RyanAir flights from all over the Europe, located 35km from Warsaw
Warsaw can be reached by direct trains from Berlin, Amsterdam, Prague and Vienna.
Polish Railways schedule is available here: PKP. The main station is called Warszawa Centralna.
The Library is located at 56/66 Dobra Street and can be reached by buses number: 105, 118, 127 (stop: Biblioteka Uniwersytecka). Another option is by reaching the main entrance to the University on Krakowskie Przedmiescie Street (e.g. bus 175, which also goes from/to the Chopin Airport and Central Railway Station) and then walk down via Obozna and Leszczynska street until Dobra Street. The Library is located relatively near to the Copernicus Science Center.
For public transport itineraries check warszawa.jakdojade.pl. Example route to the Workshop venue from the Central Railway Station: , or from the Centrum to the University and then walk towards the New Library: 
On the 9-11 September the main part of the workshop will take place in "Lindego" lecture room (formerly room 316). Note, you have to show your workshop badge to the security by the main entrance.
On the 12 September (Friday) the workshop will take place in a smaller room number 256, second floor.
The venue of the workshop is located near the Warsaw centre and near the nice area of the Old Town and the Royal Track (Krakowskie Przedmiescie, Nowy Swiat).
Here is the list of hotels in the city centre:
- Hampton by Hilton
- Novotel Warszawa Centrum
- MDM City Centre
- Castle Inn
- Ibis Stare Miasto
Some budget options: