Hidden City Festival, brushing off Philly cobwebs with art

The stairs are narrow and gloomy. Paint peels in vivid chips of blue and green. Windows are slathered with swirls of aqua and magenta paint. Floors threaten to drop away into bottomless darkness. Passages lead to warrens of small rooms filled with oddments, tattered fabric, slivers of things not quite recognizable. There's a whiff of cedar in the air.