There are three points of the Toursist Information in Warsaw
www.warsawtour.pl (fr en es)

1. Airport Chopin
Arrival Hall, Terminal A, Exit 2
Open: 8-20h

2. Palace of Culture and Science
pl. Defilad 1
Open: 8-20h

3. Old Town Market Square 19/21/21a
Old Town
Open: 8-20h