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Photo: Johannes1024, CC BY-SA 3.0 via Wikimedia Commons
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.
© OpenStreetMap contributors
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.
Stadtmauer und Grabenstraße
remains of the historic city wall. Protecting the narrow streets and buildings behind it from attacking troops and bandits, most of it eventually was broken down at start of the 1800s, sections in the southeast and northwest remain standing.
Christmas Market annually, late Nov - late Dec. Food, drinks, souvenirs between half-timbered houses.
Kirchplatz
Church square surrounded by medieval houses. Restaurants, old headstones, a war monument, cobblestone paving: A picturesque European square.
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.
Post-war rebuild square with collonnade surrounding it, shaded by trees and often host to events.