I visited this WHS in October 2014. Unfortunately I only had time to visit Wismar as I wanted to visit nearby Schwerin and also go birdwatching since hundreds of grey cranes were arriving after migration. I spent a whole day wandering around the narrow streets of Wismar, admiring the gable houses next to the red brick houses. The market square and the Wasserkunst is worth visiting as is the Bridge House and the harbour area. The main highlights of Wismar are the 3 gothic red brick churches: St Nicholas Church (worth visiting inside to view the beautiful genealogical tree fresco and the intricate triptych dating from 1430), St George's Church and St. Mary's Church (only the tower is left). Having viewed 3 out of the 6 churches I think I can safely say that I could grasp the OUV of this WHS. If ever I will have the chance to visit Stralsund, further north in Mecklenburg Vorpommern, I'll happily visit. Otherwise, I'll treasure the wonderful day I spent in Wismar.