For the past five years, the Park Avenue Armory has been the most unique project space in New York City. Since the Park Avenue Armory Conservancy took over and started restoring the building in late 2006, its 55,000 square foot drill hall has hosted ambitious, large-scale installations and performances possible nowhere else in the city.

On October 4, the Armory is celebrating its fifth birthday with a blowout after party following its gala fundraiser, turning the massive drill hall over to the festivities with an open bar, music by DJ Mick Boogie, gift bags by Baggu, and snacks from Wafels and Dinges among others. Tickets are $150 per person ($175 at the door).

We’re giving away a pair of tickets to an Artlog reader! To enter, just share your favorite Park Avenue Armory project in the comments. To get you started, here are five awesome installations from the past five years of programming at the Armory.

Update: Thanks to everyone who entered and congratulations to our winner Paul O’Connor!

Aaron Young enlisted an army of motorcyclists to skid atop fluorescent-painted panels for his Greeting Card (2007), the first project presented at the Armory (a collaboration with Art Production Fund).

Ernesto Neto’s anthropodino (2009) transformed the drill hall into a soft, organic world of fabric passageways and rooms.

Christian Boltanski’s No Man’s Land (2010) was composed of 30 tons of discarded clothing, a 60-foot crane, and the sound of human heartbeats.

Ryoji Ikeda’s the transfinite (2011) created an overwhelming visual and sonic environment from digital information.

Tom Sachs’ Space Program: Mars (2012) staged every aspect of a manned Mars mission, painstakingly assembling every piece of equipment from everyday materials.