News One World Observatory open house tickets available Thursday, May 14 Members of the Port Authority Police stand near the windows in the One World Observatory from the 100th floor of One World Trade Center at the Ground Zero site on April 2, 2013 in New York City. Photo Credit: Spencer Platt / Getty Images By CAROLINE LINTON May 14, 2015 9:53 AM Print Share fbShare Tweet Email Tickets to a preview open house at One World Observatory will be available on Thursday, May 14 at 10:30 a.m. The open house will be held on Thursday, May 28--one day before the observatory, which is on floors 100-102 of One World Trade Center, opens to the public. Complimentary tickets are available at http://owo.nyc/openhouse only. The open house will include trips to some of the exhibits, including a video board of salutations in a number of languages, the personal stories of the men and women who built One World Trade Center and Starting on May 29, the Observatory will be open year-round. From May 29 until Sept. 7 the Observatory will be open from 9 a.m. until midnight seven days a week, and then will resume non-summer hours until 8 p.m. By CAROLINE LINTON Share on Facebook Share on Twitter Comments We're revamping our Comments section. Learn more and share your input.