Home to pretty treasures, Markdorf is Germany's best kept secret. The nearest major city to Markdorf is Ulm. Take a short trip from Markdorf and set some time aside to explore the Ulm. Dotted with places like Ulm Cathedral, Fishermans Quarter, Rathaus; it will definitely be a good idea. Also, to reach Markdorf, you'll have to take a flight to Ulm; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. A holiday in Markdorf can generally be of 1-2 days.
Markdorf is an affair to remember, follow this apt itinerary of the place and return home with a bunch of memories.