If your trip to Houdan is all booked but your travel itinerary is a bit on the empty side, we can give you a helping hand.Plan a stop at Houdan Tower. It's one sight you'll find on many visitors' to-do lists. If you still have some space on that travel schedule, Church of Saint-Jacques et Saint-Christophe and Hodellia Aquatic Center will keep you on the go as well.