This website shows you the current local time. It's based on the sculpture Lichtzeitpegel mounted on the Rheinturm which is located in Düsseldorf, Germany.
https://benjamin.heisig.name/rheinturm/
The source code behind this site is licensed under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) License.
The picture was shot by Matthias Neugebauer and is licensed under CC BY-NC 2.0.