Thurgau is a region for cycling, lakes, orchards, and quiet history. The Bodensee-Radweg threads the entire northern shore. Inland, a string of small castles and the great former Carthusian monastery at Kartause Ittingen anchor most day trips. Napoleon III's family home at Arenenberg, the lakeside ferry towns of Romanshorn and Arbon, and the cantonal capital of Frauenfeld fill out the rest.