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:
Tuneles de San German. Tuneles de San German Vaulted brick storm sewer system Calle Esperanza and Calle Ferrocarril San German Puerto Rico focus nps gov pdf National Register Nomination form Luis Pumarada PDUSGov San Germn Historic District Tunnels in Puerto Rico Buildings and structures on the National Register of Historic Places