Today marks the last day of FriendsWithYou's Rainbow City, an interactive installation located underneath Section 2 of the High Line. Towering balloon pieces decorate the space's 16,000 square feet, turning a chunk of 30th street into a giant, weird playground straight out of Alice in Wonderland. But all good things come to an end. The exhibit closes at 10 PM tonight, so if you haven't visited already (or even if you have), go over and snap some surreal Facebook pics before they take the air out of everything. Here's what it looks like: