This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Hamburg Elbtunnel. en Postcard dated Title Cap Finistere over Elbtunnel and ElbTunnel HamburgSteinwrder This tunnel which was finished at the cost of million marks under enormous difficulties is long and ca in depth under sea level Its diameter is ca The biggest ships pass above de Postkarte datiert Titel Cap Finistere ber