We’re renting an apartment about 20 minutes south of Freiburg for a week in August as part of a longer holiday. We’ll spend some time in Freiburg, definitely want to visit Colmar or Mulhouse and take a cable car up a mountain (Feldberg?). Does anyone know this area well and can recommend some activities or places to visit? We’d ideally like to visit a lake we can swim in but the reviews suggest Titisee isn’t great. DCs will be 11 and 16.