The Open House programme, which gives the public a chance to see buildings and sites that are usually off limits, comes to New York this weekend. Here's 10 places we recommend to explore over the next two days.

Austrian Cultural Forum
With one of the most distinctive facades in Manhattan, architect Raimund Abraham's slender tower has housed Austria's cultural representation offices since it was completed in 2002.
Sandwiched between two structures in Midtown, the building reaches 81 metres high but is only 7.5 metres wide. Behind its glass and metal frontage, which slants away from the street towards the top, is a series of exhibition spaces, a theatre, a library, and apartments for the institution's officers.
11 East 52nd Street Midtown, Manhattan. Saturday 10am-6pm.
Brooklyn Army Terminal
This vast structure by renowned Beaux Arts architect Cass Gilbert once served as the biggest military supply in the US, and was the largest concrete building in the world when completed in 1918.
Derelict for many years, it has now been turned into an industrial campus that is home to more than 100 tenants and 3,600 employees.
140 58th Street, Sunset Park, Brooklyn. Saturday and Sunday, 12-5pm.

Concrete Plant Park
The giant red structures of a once-active concrete plant now form landmarks as part of this waterside park designed by James Mituzas in 2009.
Tours of the site during Open House weekend will also take in an abandoned Cass Gilbert-designed rail station, which is slated for r...