Los Angeles/Harbor Area
Apart from taking a cruise, or taking a ferry to Catalina Island, there's not a whole lot for the traveler or tourist to see or do. the Cabrillo Marine Aquarium, the Los Angeles Maritime Museum, San Pedro Bay Historical Society, USS Iowa and the Banning Residence Museum web sites are helpful when planning.
Take the Harbor Freeway or Pacific Coast Hwy.
The City of Long Beach, a bustling metropolis of over 600,000, has many things to see and do. It's technically its own area, and if it were further away from Los Angeles would be more widely recognized for its own merits. But since it is overshadowed and overlooked by its big sister, has a massive harbor, some Angelenos (local Los Angeles residents) think of it as part of the Harbor Area.
The Vincent Thomas Bridge, connecting San Pedro with Terminal Island, was referenced in the Red Hot Chili Pepper's song "Under the Bridge". The bridge is in a really desolate, industrial area.
San Pedro has Cabrillo Beach with the Grunion Run every year. Every Labor Day San Pedro hosts LA Fleet Week. San Pedro also has the Cabrillo Marine Aquarium, the Los Angeles Maritime Museum, San Pedro Bay Historical Society, USS Iowa and the Banning Residence Museum.
Wilmington, a district of Los Angeles that is home to the Banning House, former residence of the man who brought the L.A. Harbor to fruition, and the Drum Barracks, a Civil War era U.S. Army post.
USS Iowa a WWII battleship is open for tours 
The Queen Mary is open for self-guide tours 
Scorpion Submarine (Russian Submarine) 
Aquarium of the Pacific 
Note : You can buy Package Deals to see both the USS Iowa, The Queen Mary and Scorpion Submarine or USS Iowa and the Aquarium of the Pacific. 
Artist Galleries along W 6th & 7th streets
Porky's BBQ, 
Lots of Bars along West 6th St. 200 to 500 W. 6th Brouwerij West is a brewery and tasting room located at 110 E 22nd St, San Pedro, CA 90731