Here are a few suggestions for your next trip from Paris Invalides

In 2 hours, you can reach Paris, Reims.

In 3 hours, you can reach Brussels, Lyon, Nantes, Anderlecht, Strasbourg, Schaerbeek, Rouen, Lille, Molenbeek-Saint-Jean, Rennes...

In 4 hours, you can reach London, Luxembourg, Antwerpen, Rotterdam, Marseille, Esch-sur-Alzette, Gent, Basel, Dudelange, Charleroi...