Somehow both space-age and D.I.Y., the Watts Towers are an awe-inspiring series of 17 interwoven sculptural pillars built from scrap metal and concrete and decorated with found objects like glass bottles, volcanic rock, and ceramic tile. Coming here is nothing like any other museum experience in Los Angeles. Italian immigrant construction worker and artist Sabato “Simon” Rodia built the towers over a 33-year period, from the 1920s through the 1950s. They’re considered a prime example of “outsider art,” and can be visited for free in the Simon Rodia Historic State Park in the Watts neighborhood in south Los Angeles.