Green, greener, as green as it can get!
In the immediate vicinity of Leiden you can find various estates which are easy to reach by car or by bike. Ask for directions at the tourist information agency VVV.
The Hollandse Plassen area with the Kagerplassen is also easily reached from Leiden. Get in the boat and experience the beautiful Dutch landscape from the water, see the windmills, cows walking the polder landscape, and the sleek silhouette of white sails at the horizon. Here you can also find various water-side cafés, you can rent a boat on your own or hop on one of the many well-catered boat tours. The rural and green Warmond adjacent to the Kaag is also well worth a visit.