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Photo: Andre Schaefer, CC BY-SA 2.0 via Wikimedia Commons
Ruins of late 12th-/early 13th-century Isenburg castle, ruins dug out 1969-1989 by local school club, great view over Hattingen and Ruhr, small museum open Sun/Holiday afternoons.
© OpenStreetMap contributors
Ruhrtalbahn
The railway museum in Bochum offers rides on historic trains between their Museum and Wetter-Wengern via Hattingen on the Ruhr Valley Railway between April and Oktober. On the first sunday of the month the trains will be pulled by steam engines.
Bismarckturm
11-m-tall stone 'tower' build in 1901 to honour former Reich-Chancellor Otto von Bismarck. Key can be borrowed from nearby Schulenburg restaurant.
Glückauf-Trasse
27-km-long former Hattingen-Wuppertal Railway via Sprockhövel, closed in 1988, now foot- and cycle path. It's not paved but it is well maintained, no lights at night. Plenty of nature and occasional railway remnants like tunnels, bridges, station buildings.
Post-war rebuild square with collonnade surrounding it, shaded by trees and often host to events.
Untermarkt
One of the main places of the historic centre. Very busy during events. 1 - 24 December "Frau Holle" (Miss Holle) will open a calendar window in the facade of the old town hall, read stories and throw sweets every day at 17:00.
Obermarkt
Small square with water art installation reminding to the days of horse-drawn shipping on the Ruhr River.