From Stamps of the World
Warmond is a village and former municipality in the western Netherlands, north of Leiden in the province of South Holland. Together with Sassenheim and Voorhout, it became part of the Teylingen municipality on 1 January 2006. Warmond is located in an area called the "Dune and Bulb Region" (Duin- en Bollenstreek), and is notable for being extremely affluent.
Read more @ https://en.wikipedia.org/wiki/Warmond