Hidden in the greenery near Westerpark, the perfect hideaway from street noise can be found if you know where to look: a little farm called "De Buurtboerderij". Surrounded by a bunch of sheep and a happily decorated garden, the restaurant inside serves one fixed menu a week for a low price. The farm serves as community center as well and is run by volunteers — and you when you eat there! — and there are plenty of sweet people and animals to hang out with.
Hannekes Boom is one of the nicest waterfront café in Amsterdam to have a beer when it's sunny. Close to Central Station, the place isn't crowded by tourists, but you need to be there early to get a seat.
Almost every underground station in Amsterdam has a fascinating story behind it. My favourite one is metro station ‘Weesperplein,’ because it has a hidden station underneath the actual station that was meant for the 'Singellijn.' However, that line was never build and the second station remained useless. Besides that the hidden station was also equipped to serve as a shelter during the cold war. The large doors that were meant to hermetically close the building are still visible at both ends of the platform. Other small details, like the panels in the ceiling than can be used as tables when turned around, are also silent references to the building’s former use.