National Museum of Mexican Art — Always Free

You'll walk through three millennia of Mexican art history without dropping a dime—the National Museum of Mexican Art in Pilsen is the largest collection of its kind in the US, and it's perpetually free. The rotating exhibitions span everything from pre-Columbian artifacts to contemporary installations, housed in a space that feels like a cultural institution should: ambitious but genuinely welcoming. Stop by Tuesday through Sunday, 10 AM to 5 PM, and bring whoever wants to come—it's all ages, zero gatekeeping.