If the day's weather forecast is grim, why not spend the day at Museum Langenthal? You'll be fascinated by just how many interesting facts you can discover about the past here.
You'll have no end of sightseeing choices when in Langenthal. Museum Langenthal is an ideal place to kick off here, but there are loads of other interesting attractions to explore. Gurdwara Sahib Switzerland, and Evangelical Reformed Church are not far from the collection of historical artifacts and will top off your day nicely.