Photos: Check Out Exxopolis' Trippy, Colorful Inflatable Domes At Grand Park

"Exxopolis" might sound silly at first: it's an inflatable winding maze of domes currently camped out in front of City Hall at Grand Park. But the interiors are stunning. The structure, called a luminarium, was designed by a British group called the Architects of Air who say they were inspired by Islamic architecture and Gothic cathedrals. The effect is a little like stained glass, a little like a James Turrell.

The luminarium will be open to the public for the next two weekends. You might be surprised by one of the 80 short performances planned, including Korean classical dance, African American folktales, mariachis and Klezmer melodies. It's free, but we're guessing there will be a wait for walk-up tickets since advance tickets already sold out.

You can enter the Exxpolis from 10 am until 6 pm, today and tomorrow as well as September 13-15. Advance tickets are sold out, but there will be a limited number of tickets available for walk-ups.