* Bay of Biscay: The Bay of Biscay is an arm of the Atlantic Ocean that lies between Spain and France.
* Mediterranean Sea: The Mediterranean Sea borders Spain to the east and south.
* Cantabrian Sea: The Cantabrian Sea is an arm of the Atlantic Ocean that lies between Spain and France.
* Strait of Gibraltar: The Strait of Gibraltar is a narrow strait that connects the Mediterranean Sea to the Atlantic Ocean.
* Gulf of Cadiz: The Gulf of Cadiz is an arm of the Atlantic Ocean that lies south of Spain.
* Mar Menor: The Mar Menor is a saltwater lagoon located in the Murcia region of southeastern Spain.
* Albufera de Valencia: The Albufera de Valencia is a natural lagoon located in the Valencia region of eastern Spain.
* Laguna de la Mata: The Laguna de la Mata is a coastal lagoon located in the Alicante region of southeastern Spain.
* Embalse de Alarcón: The Embalse de Alarcón is a reservoir located in the Castile-La Mancha region of central Spain.
* Embalse de la Serena: The Embalse de la Serena is a reservoir located in the Extremadura region of southwestern Spain.
* Embalse de García Sola: The Embalse de García Sola is a reservoir located in the Andalusia region of southern Spain.