Chelsea · Art gallery · Museum
Start on 19th Street at David Zwirner, where Selldorf Architects gave three connected buildings 18-foot ceilings and sawtooth skylights that make even the most intimidating contemporary work feel approachable. The new flagship is the kind of place where you can spend a full hour debating a single piece without anyone rushing you out — and admission is always free. Go mid-afternoon so you're not scrambling against the 6pm close.