The B&B has leaflets with more information about everything mentioned below and more.
Zeeweg 10, Castricum: 11,4 km by car, parking during high season: €6,50. By bike: 5 km to the dunes, then 9 km through the dunes to the beach.
Can only be reached by bike, foot, or bus: 5 km to the dunes, then 4 km through the dunes to the beach.
Uitgeest is a nice town with lakes for water sports, as well as a swimmingpool, supermarkets, playgrounds, and bowling in Bob's Party Palace (Westerwerf 1)
The next town over, Heemskerk, is home to Slot Assumburg (Tolweg 9 - 1.7 km), a medieval castle with a beautiful castle garden.
30,5 km. Train to Amsterdam Central Station: ~30 minutes. Visit Dam Square, Madame Tussauds, etc.
The center of Zaandam was recently transformed into a unique shopping area. 20 minutes by train, or about an hour by bike.
Cities like Alkmaar, with the cheese market on friday, and Haarlem: very much worth visiting.
Outdoor museum on the river 'De Zaan', Schansend 7, Zaanstad. Old windmills, museums, and historic houses and stores.
The area around Uitgeest is a great place to cycle. There are also beautiful lakes nearby.