The best area to stay in Rheinfelden, Switzerland, is the Old Town (Altstadt), particularly around the Inseli peninsula.This charming area is the historical heart of Rheinfelden, located directly on the Rhine River. It's characterised by well-preserved medieval buildings, narrow cobbled streets, and scenic river views. The main street, Marktgasse, is home to many local shops, cafes, and restaurants. The Inseli, a small island park connected by a bridge, offers a peaceful green space right in the river.Couples looking for a romantic and relaxing getaway will find the Old Town ideal. The historic architecture, gentle river cruises departing from nearby, and a selection of excellent dining options create a ideal setting. You're also within easy walking distance of the Rheinfelden Thermal Baths, known for their saltwater pools and wellness treatments.For those keen on exploring the region by train, staying near the Rheinfelden train station, just a short walk from the Old Town, offers excellent convenience.