Exxopolis, an inflatable art cathedral, kicked off its two-weekend run in Grand Park on September 7th. Standby ticket hopefuls lined up for a chance to explore the labyrinth of light and soundscapes at the sold-out installation from UK-based Architects of Air. The walk-in sculpture opened the Music Center's World City season by bringing art in Los Angeles to the masses in a space to rival the city's best performing arts centers; performances of exotic instruments, dance, puppeteering, spoken word, or Random Acts of World Culture, filled the colorful domes with a celebration of LA's diverse communities and traditions. Make your way Downtown while Exxopolis is still up; it's not everyday that free events in LA are quite this cool.