Classical Weimar is a unique world heritage as it represented the world of ideas during the enlighten age in Germany that influenced many works of German philosophers especially in this case - Goethe and Schiller.
The Ducal of Weimar played a major role in supporting and creating the suitable environment for the development of humanistic ideas to German thinkers. Weimar's royal family invited Goethe and Schiller to work in their court, as a result this WHS is a collection of homes of these two great men and many places related to Weimar ducal family (or you can say another long list of palaces in World Heritage list)
Apart from Goethe and Schiller Houses, which are very nice, I also visited the mausoleum of royal family, which is not impressive at all, but my favorite is the landscape of the park an der Ilm which reputedly designed by Goethe. The park is really nice with many trees along the small Ilm River valley and Goethe's garden house was so cute. When I looked on the hill behind the garden house, I was so shocked to find out that the modern Haus am Horn (another WHS) is almost in the same line with the simple old-fashioned house of Goethe created a great one photo shot with two contrast WHS.
Weimar is charming and has a lot of attractions for tourists, the food is also nice, and the cost is still low compared to other German tourist places making a perfect destination for everyone.