Claim: The Kliff and the nearby heath-covered area (around 43 hectares) have been a nature preserve since 1923, which prevented the planned use of the sand deposits in construction of the Hindenburgdamm.
Evidence: The Kliff and the nearby heath-covered area (around 43 hectares) have been a nature preserve since 1923. This prevented the planned use of the sand deposits in construction of the Hindenburgdamm.