Munster of Ulm by Peterodl
The 2nd biggest church in Germany behind Cologne, with the tallest spire in the world 161.5 meters tall (768 steps), the Munster dominates the Ulm skyline but it is easy to lose it when walking down the streets. Outside on the Munsterplatz, every Saturday morning there is a market with fresh produce for sale. The quality and quantity is outstanding.
Inside the Munster, you can climb the tower for about 2.50 Euros (well worth it).
The choir stalls were carved in the 15th century and are amazing to look at.