Red Thread
Located in Hanover · Website: www.visit-hannover.com/en/Sightseeing-City-Tours/City-tours/The-%22Red-Thread%22-Hannover
Wikipedia
The Red Thread (German: Roter Faden) is a 4.2-kilometre (2.6 mi) urban walking trail in Hanover, Germany, to 36 significant points of interest about architecture and the history of the city centre.