Kunsthalle Würth & Johanniterhalle (art museum)
http://www.kunst.wuerth.com/de/portal/startseite.php

Picasso, Liebermann, Lucas Cranach the elder...Hall has gained a reputation as a city of culture i.a. thanks to the high-profile exhibitions at Kunsthalle Würth, which focuses on 20th and 21st century art from the Würth collection, while the "old masters" have found a new home in the Johanniterkirche.

Grand staircase of St. Michael / open-air theatre (Freilichtspiele)

http://www.freilichtspiele-hall.de/de/

Mind the steps! Theatre lovers from around the world gather every summer on the market square in front of Germany's most beautiful open-air stage. The 510-year old grand staircase of St. Michael has served as the main venue of the open-air theatre festival in Halle since 1925.

Historical city centre
http://www.schwaebischhall.de/erlebnisstadt/sehenswert/historische-altstadt.html

Your heart will start beating with anticipation as soon as you see the wonderful cityscape from our terrace. The Market Square and St Michael's Church (12th century) are only 10 minutes' walk away via the Henkersbrücke. Narrow streets, medieval half-timbered houses and baroque architecture - there are sights at every turn.

Hällisch Fränkisches Museum
http://www.schwaebischhall.de/kulturstadt/museen/haellisch-fraenkisches-museum.html

The museum documents 860 years of the city's history which provides plenty of exciting material to explore - from the geological origins, the middle ages, the reformation, salt production through to the present day. 3000 m² of exhibition space is scattered over seven historic buildings in the historical city centre. Free admission!

Comburg
http://www.schwaebischhall.de/kulturstadt/museen/gross-und-kleincomburg.html

In Steinbach, there is a former Benedictine monastery (founded in 1078).