I've been following the work of Friends of the High Line for several years now. Its such an intriguing project - take an abandoned, overgrown elevated railway track in the middle of Manhattan and turn it into a public meeting space, transportation corridor, and sustainable urban green space. They've managed to get funding, support from the mayor and city officials, and enough public awareness to garner an exhibition at the MoMa that opened yesterday. The show displays for the first time the projected designs for the 1.5-mile structure, but the designs are also nicely showcased in this online presentation.

You can also wander through some interesting photo galleries of the High Line in its current state.