The Strasbourg cathedral has also an astronomical clock, see https://en.wikipedia.org/wiki/Strasbourg_astronomical_clock

Sorry for that, it's already on the list. My fault, it was late last night...

Connection: Water Wheels

I believe that the Water Management System of Augsburg has at least two functioning water wheels: Wasserrad am Vogeltor and Wasserrad am Schwalllech. Both the Vogeltor and the Schwalllech are part of the 22 elements that make up the WHS.

Connection: Prison

Parts of the Dutch Water Defence Lines have been used a a prison. Very famous in the Netherlands (in the Canon of Dutch History) is that Loevestein Castle was a state prison in the 17th century in which Hugo de Groot was kept as political prisoner. After WWII some of the forts have been used as a prison, like Fort near Edam.

Connection: Notable Bridges
Since the Upper Bridge (Obere Brücke) of Bamberg features in almost all randomly googled pictures of the town (even on our own page), I would already give it credits for being a notable bridge. But also, UNESCO states for the OUV: 'Of particular interest is the way in which the present town illustrates the link between agriculture (market gardens and vineyards) and the urban distribution centre.' This where the bridge played its notable role in the past, see for example here.

Connection: Tunnels
The town of Bamberg also has a significant historic network of tunnels, part of which can be visited.

Modelled after: Bahá'i Holy Places

A duplicate to delete

Cultural sites taking up an entire island: Fortifications of Vauban: Tatihou

Fatal Accidents or 'disasters': Ha Long Bay – Cat Ba Archipelago

We could extend the 2011 accident (12 deaths) to that of 2025 (39 deaths).

https://en.wikipedia.org/wiki/Capsizing_of_the_Wonder_Sea

Connection European Industrial Route

Ivrea
Verla
I think Norway is missing one too

nfmungard Indeed, Rjukan / Notodden is in Norway one of the anchor points on the ERIH.

Connection Olympic Venues: Dutch Water Defence Lines

At the 1928 Olympics in Amsterdam, the men's cycling event (a time trial over a distance of 168 km) went from the former Hembrug near Zaandam via Spaarndam, Haarlem, ..., to Scheveningen, and back (wiki in Dutch). Thus, crossing the core zone of the Dutch Water Defence Lines twice.