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San Diego County, CA

Tijuana River Estuary
Tijuana River Estuary, a National Natural Landmark in San Diego County, CA.

National Natural Landmarks in this county include:

← Back to listing of NNL sites in CA.

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Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.

Last Updated: June 28, 2012