Bunker Hill is a neighborhood in Los Angeles, California. It is part of Downtown Los Angeles. Historically, Bunker Hill was a large hill that separated Downtown Los Angeles from the western end of the city. The hill was tunneled through at Second Street in 1924, and at Third and Fourth Streets. In the late 20th century, the hill was lowered in elevation, and the entire area was redeveloped to supplant old frame and concrete buildings with modern high-rises and other structures for residences, commerce, entertainment, and education.