Traditionally speaking rooftops are the preserve of chimney sweeps, burglars and Santa, but take a trip down to the Warsaw University Library building and that opinion will quickly change. Topping off the bizarre oxidised green building is one of Warsaw's best-kept secrets: a two-level rooftop garden filled with bridges, streams, pathways, sculptures and plant life that covers an entire hectare. There’s even a fishpond (yep, that’s probably a duck you’ve spotted doing laps) and a stone fountain mixed in among all the greenery like oak trees and Japanese spirea. Designed by Irena Bajerska and opened back in 2002, the garden and viewing platforms afford panoramic views of lower Warsaw including the river, the Copernicus Centre and across the river to the PGE National Stadium in Praga. A wonderful place to stop and rest in the heart of the city, take a picnic and sit amongst the groups of students taking time out from studying (ahem, napping) at the library below. Easily one of the best places in town to get on bended knee and ooze some serious schmooze, should that be your wish.