Poissy, located along the banks of the Seine River, offers a blend of history and modernity. One of the most notable attractions is the Villa Savoye, a masterpiece of modern architecture designed by Le Corbusier. This house exemplifies the principles of the International Style and provides insights into early 20th-century design.

The Saint-Louis Church is another significant site, showcasing a blend of Gothic and Renaissance architecture. Its beautiful stained glass windows and historical significance make it a peaceful spot for contemplation.

For those interested in local history, the Musée de Poissy presents exhibitions that delve into the town's past, including its connection to the automotive industry, as Poissy was home to the famous Peugeot factory. Visitors can learn about the evolution of the town and its contributions to French culture.

The Île de la Jatte, a nearby island, offers a serene environment perfect for leisurely walks or picnics. The natural scenery along the Seine provides a quiet escape from the urban atmosphere.

Additionally, Poissy's local markets are worth exploring. These markets provide an opportunity to experience the local culture and sample fresh produce, cheeses, and baked goods. Engaging with the vendors can offer insight into the daily life of the residents.

In terms of transport, Poissy is well-connected to Paris, making it accessible for day trips. Overall, the combination of historical sites, cultural experiences, and natural beauty makes Poissy a worthwhile destination for visitors looking to explore beyond the typical tourist paths.