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Though the boardwalk was built for powerline maintenance, it serves also to provide access to the wildlife-rich salt marsh.
PG&E boardwalk, north of Baylands Park, Palo Alto, CA (1978).
The tower was built just to watch the birds at this refuge on the Pacific flyway.
Delevan National Wildlife Refuge, near Maxwell, CA (1988).
An elevator takes tourists down to a sea cave full of sea lions.
Sea Lion Caves, near Florence, OR (1986).