Intriguing spaces at PS1

The projects at Queens New York's MoMA PS1 that got me intrigued today were both about the perception of space coincidentally.

James Turrell's installation Meeting:

Winner of PS1's Young Architects Program this year, Interboro Partners' transformation of the PS1 courtyard:

That reminds me of another PS1 spatial installation project from 2009, Swimming Pool by Leandro Erlich: