Photo courtesy Open House New York: Nicolas Lemery Nantel

Every year, Open House New York celebrates architecture, urban design and public space by providing people with unparalleled access to architectural sites in New York. Since its inaugural year in 2003, the weekend event has grown to include over 200 participating sites across all five boroughs.

This year marks the 15th anniversary of OHNY weekend, which will take place on October 14th and 15th. Today also happens to be the official release date for all the 2017 locations. In celebration, we’ve curated a list of Open Access sites to check out, which do not require advance reservation.

In partnership with OHNY, Untapped Cities is also excited to announce a giveaway for a Weekend Passport, a VIP pin that gives the wearer and a guest front-of-the line access to as many as 150 participating sites. To enter the contest, see our Rafflecopter embed below. You can win entries by interacting with us on Instagram, Twitter, and Facebook! The giveaway will run until end of day October 7th, 2017.

a Rafflecopter giveaway

In the meantime, here are 10 must-visit open access sites to check out this OHNY Weekend:

10. New York State Pavilion

Not much remains of the 1964-65 World’s Fair aside from the ruins of the New York State Pavilion. Designed by architect Philip Johnson, the stunning structure, regarded as the jewel of Flushing Meadows-Corona Park in Queens, is comprised of three components — the “Tent of Tomorrow,” which once supported a cable suspension roof, the “Theaterama,” currently home to the Queens Theatre, and the three concrete Observation Towers, including two shorter towers that held once cafeterias and one taller tower that held an observation deck.

This year, we hosted two special access, hard hat tours inside the Pavilion. See photos and video footage of the experience here.