a natural harbor with large rocks blocking the entrance and plants in the foreground
Corral Harbor on San Nicolas Island. ©Steve Schwartz.

Harbors can either be manmade or natural. A natural harbor is an indentation in the coastline surrounded by land that juts out into water. Manmade harbors are constructed by building jetties or by dredging (digging out and moving the sediment from) an area of water.

Last updated: November 9, 2018