New York · Rafael Viñoly

432 Park Avenue

The really skinny one on Billionaires' Row. It's 15 times taller than it is wide, so most of the engineering goes into keeping it from swaying.

1,396 ftConcrete2012–2015

New York · Foster + Partners

270 Park Avenue

JPMorgan's new headquarters. Grand Central's train tracks run under most of the block, so the whole tower sits on a giant steel table.

1,388 ftSteel2021–2025