From OpenwaterpediaCatalina Channel crossings that go from Santa Catalina Island to the California mainland.
Though once slated for development, the area is geologically unstable and is unsuitable for building.
The geographical location and geological history of the peninsula make the remaining habitat extremely valuable for ecological and other scientific reasons. The peninsula, which was an island with the Palos Verdes Hills in recent geological time, has close floral and faunal similarities to the Channel Islands. This feature makes the Portuguese Bend Landslide area a natural research laboratory for the study of island biogeography and evolutionary ecology. The vegetation found in the area is coastal sage scrub. This plant community supports a surprising number and variety of species. There are at least three races of birds resident on the peninsula that are found nowhere else except the Channel Islands. These are the insular forms of the Orange-crowned Warbler, Pacific-slope Flycatcher, and Allen's Hummingbird. The same phenomena has been documented for plant species. A species of live-forever, Dudleya virens, which is endemic to the Channel Islands and the Palos Verdes Peninsula, is found near Point Vicente Lighthouse, which was built in 1926.