More cave-itecture under the High Line. Architecture firm Leong Leong and fashion designer Siki Im have teamed up for the fifth and final installation in the Building Fashion series of pop-up collaborations beneath Chelsea’s High Line Park. Picking up where Snarkitecture and Richard Chai left off, Leong Leong has turned the former Sales Tin for Neil Denari’s HL23 condos into another amorphous cave-like interior—only now you’ll have to take off your shoes before entering. “We wanted to radically transform the interior,” explained principal Chris Leong. “We wanted to breakdown the traditional pop-up experience.” To do this, the firm oriented the store around a parabolic, foam-covered ramp and hung clothes seemingly at random from the walls and ceiling, which were sculpted with the same soy-based spray-foam. Leong Leong, a winner of the AIA’s 2010 New Practices New York Competition, is no stranger to the fashion world. The New York firm has designed stores for Phillip Lim and Opening Ceremony in New York, Los Angeles and Seoul. The Siki Im pop-up is located at 504 West 24th Street and will remain open through November 15. More photos available from BOFFO.