Noordwijk , situated between the major cities is a pretty good jump off point for cultural daytrips

Leiden :(6 miles) City of birth of Rembrandt, City of Canals, Ruins and Medieval Centre, Botanical garden where Clusius planted the first tulip 400 years ago, " Naturalis " natural Geschiedenis museum and 12 other museums, but Leiden is also a student city and with its many bars and about 25 coffee shops a good place to go out in.
The Hague : (10 miles) " Madurodam " all famous features off Holland You will find in this miniature city. Government and Embassies, a couple of good museums and a good shopping district.
Rotterdam : (20 miles) Biggest harbour in the world, well known for it's architecture.
Haarlem: (15 miles) Medieval city with beautiful markets.
Amsterdam :(20 miles) Needs no introduction.
Estec :( 1 mile) European Space research and Tecnology centre, largest branch off European Space Agency (ESA) They have a permanent space exhibition with satellites and space rocks.