When you walk through Noordwijk Binnen you think you're in a open air museum, the old, historic centre has buildings or parts of old buildings from the 15th century, there's even a tower from 1320. The church is from the 15th century and the preacher's chair from the 17th. Even when you're in a cafe or bistro enjoying a drink you're in some kind of museum, so have a good look around and wander back in time. A lot of monuments and museums (Atlantikwall Museum) are there because of WWII (Liberty monument).
Museum tips outside Noordwijk: Amsterdam museums, Delft museums or Rotterdam museums