In this year's Best of Phoenix we are taking you underground, but here's a hidden treasure you'll find on the top floor of the Phoenix Art Museum. We admit we're guilty of neglecting our city museum's permanent collections — we're more likely to hit PAM or the Heard Museum to see a blockbuster show. But this year we had occasion to take a stroll through the contemporary collection upstairs at the Phoenix Art Museum, and we were so glad we did. A friendly museum guard told us to be sure and check out the fireflies — and after some hunting we came upon a funny-looking closet-like exhibit lit with hundreds of teeny colored lights, with mirrored ceiling, floor and walls. The effect (once you get over a bit of claustrophobia) is, true to the exhibit's name, like finding yourself in a swarm of fireflies. Best of all, the fireflies are part of the museum's permanent collection, so you can take your time getting over to see them.