I see you have visited forests & trees in western Germany, too. Near Nohfelden, Rheinland Pfalz, there would be very tall larches (Larix decidua). The tallest is claimed to be 50 m tall, it would be a European record. The location is a bit too far for me; perhaps you live closer to it. It would be great if you could go to measure there. You find some information if you make a Google search 'Nohfelden lärche "50 meter"'. I don't know how your German is; if you cannot read it, you can use the Google Translator.