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Photo: Langladure, Public domain via Wikimedia Commons
Leisure park and nature reserve around a beautiful lake, ideal for water sports, fishing and horse riding.
The Étang de Saint-Quentin, or pond of Trappes, is the largest body of fresh water in Yvelines with a surface of approximately 2.5 km². It on in the perimeter of the new town of Saint-Quentin-in-Yvelines, in the commune of Trappes and Montigny-le-Bretonneux. The lake an important base of outdoor recreation. To the west of the lake a national natural reserve of 0.87 km² was established in 1986.
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Miniature park containing scale models of France's main monuments and attractions, if you want a whistle-stop tour of France without leaving the Paris region. Ideal for families.
National Vélodrome de Saint-Quentin-en-Yvelines
Velodrome and BMX track.
Local museum detailing the history of the new town project and the former villages that constituted it.
Lac de la Sourderie
Surreal postmodern housing estate built around an artificial lake, completed in 1981 by the architect Ricardo Bofill as a 'Versailles for the People'.
Parc naturel régional de la Haute Vallée de Chevreuse
Rolling hills with scenic villages providing a nice hiking destination. Also home to some old Chateaus and the ruins of the Abbaye de Port-Royal-des-Champs.
Stately home and park from the 18th century.