It's a heady time for Baltimore's art scene, with some of the city's venerable artistic institutions in promising flux. Kwame Kwei-Armah, the new artistic director of professional theater company Center Stage-which this year celebrates 50 years of existence-has planned an intellectually engaging first season, the Everyman Theatre moves into its regal new Westside space this fall, and the Baltimore Museum of Art is in the midst of a $24 million renovation. Meanwhile, Baltimore has become such a mecca for young artists that it's difficult to keep track of all the new theater companies, galleries, and spontaneous art happenings constantly emerging. One of the most visible such endeavors of the past year is Open Walls Baltimore, a massive, city-sanctioned Station North mural project that includes pieces by internationally acclaimed street artists. That's one "museum" you can visit for free, but there are numerous others. And those local cultural sites that charge admission are generally well worth the price. Here's an abbreviated guide to both sorts. Happy hunting.