The UCSC campus is set in one of the most beautiful locations of any campus in the US. Between the (second/third-growth) redwood forests among which the academic buildings are nestled and the expansive views of Monterey Bay from the lower part of campus, there's spectacular nature everywhere.
The campus is on the side of a hill, with bridges across several ravines that run down the hill - be prepared for good exercise if you walk the upper campus. Don't miss the "wave" sculpture at Porter College or the chance to walk across a pedestrian bridge in a redwood forest. Just make sure you have a map, since the campus was designed to have the buildings blend into the forest, making it somewhat difficult to find your way from point A to point B. Don't forget to look around at the flora and fauna, too; I often see deer, birds, and banana slugs (the real thing!) on campus, and have seen several species of raptor hanging out as well.
Disclaimer: I may be biased since I drive / walk onto campus every day for work.
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