The Mattress Factory, Pittsburgh

I did not truly appreciate this place until I left Pgh. Three James Turrell installations, two Yayoi Kusama rooms, the temporary exhibits are always good. Plus it's in a fan-favorite neighborhood with lovely outdoor space and sneaky art pieces scattered nearby.

Pictured is Sarah Oppenheimer's 610-3356, a "wormhole" from a fourth-floor gallery out through a third-floor window.