A few kilometers outside of Haarlem, there is Bloemendaal. Known most for its beach, Bloemendaal also has lots and lots of sand dunes that stretch for many kilometers.

This year the organization "Duin en Daal" (dedicated to the dunes) celebrates 100 years of being dedicated to preservation, appreciation, and use of the dunes. In honor of that landmark, they will be hosting a series of nature walks through the dunes. Last week was the first of the season, with the next walk taking place on the 26th of April. Consult their website for phone numbers and other info in order to get in on the walk. As someone who has wandered the dunes on bike for hours on end, I highly recommend this beautiful and therapeutic activity.