The park An der Burg covers an area of 10,600m² at the gates of the medieval town centre. It was once under water, as one of several fish ponds was located between the moat and the city wall until the early 19th century. These were initially filled in and later converted into meadows and green spaces.

Among other things, the oldest Gingko tree in the city can be found here: with a height of 23m and a trunk circumference of over 3.60m. In the heart of the park there was once a war memorial for the war of 1870/71. Today, the city plants the most beautiful seasonal flowers and perennials there every year.

The Lindenbühl was first mentioned in 1316 and is named after the lime trees (Linden) planted in the moat and the vernacular word for hill (Bühl). As part of the fortification system the moat protected the medieval city for many centuries. In the 19th century gardening inspector Adolf Pollex oversaw the transformation into a promenade. Numerous mansions were built along this green belt, and when a new grammar school was erected in 1867, which today houses the Museum of Mühlhausen, the city wall was partly torn down.

The former Eselspforte (donkey gate) lent its name to the Pfortenstraße. The street led straight to the Margaret Hospital, which was founded in 1358. Today the school buildings of the Tilesius-Gymnasium, a secondary school built in 1913/15, are located in the area. The medieval gate (Pfortentor) was torn down in 1891. To the west borders the impressive Hirschgraben wall, laid out in 1505. Towards the end of the 18th century prosperous citizens erected several pavilions and garden houses on the foundations of the city walls’s once massive round- and half towers.

The former monastery church of St. Crucis now houses an exhibition that provides information about the course, highlights and aftermath of the German Peasants' War in the context of the time. The monastery garden, a green gem in the middle of the old town, is an insider tip.

The monastery garden was designed according to the ideas of the medieval scholar Albertus Magnus. He transformed the kitchen garden into a "pleasure garden", where not only herbs but plants that served the general stimulation of all the senses were at home. This concept and the importance of plants are presented during regular guided tours through the monastery garden in the area of the former cloister of the Kornmarktkirche.

The Claes Park is the youngest park in Mühlhausen. It was created on the former factory site of Claes & Flentje, which covers an area of just under 5000m². Sewing and knitting machines as well as bicycles once went from Mühlhausen into the world. Since 2015, a memorial stone commemorates the company founder Ernst Bernhard Claes.

Today, the park is a combination of recreational area, playground and fitness track. Visitors can keep fit with balance and equilibrium exercises as well as strength training at a total of 5 sports stations. A special eye-catcher is an approximately 3m high climbing element in the shape of a C, which is a reminder of the history of the park area.

The Hohe Graben was the eastern bank of the former Itschenteiche, which were located in front of the western gates of the city wall. Today, visitors can walk along its crest as an extension of the Hirschgraben wall from Blobach to Lentzeplatz and on towards Lindenbühl.

In addition to breathtaking views of the churches of St. Mary's and St. Jacob's, the Hohe Graben with its historic lanterns and wrought-iron railings has a French feel. Coming from Lentzeplatz, a 24m high Dutch elm welcomes its guests and invites them to over 12,000m² of green bathing.