The Overwaard Mill No. 6 is one of eighteen mills in the Kinderdijk area. The Kinderdijk group of mills is the largest collection of mills in the Netherlands, and is a fine example of Dutch engineering skill and classical architecture. The entire site is considered a World Heritage Monument, and the attraction pulls in 3,000,000 visitors each year, of which around half are foreign tourists who have came to the area specifically to see the windmills.