Yerba Buena Center for the Arts is throwing open its doors for a free admission day on Tuesday, April 29. It’s a perfect chance to check out whatever’s on view—whether that’s installations, performances, or gallery exhibits—without the usual ticket cost. Show up anytime between 11 am and catch what’s happening. YBCA always has something interesting going on, so this is a solid way to dip into the contemporary art scene in the heart of SoMa.