6. Arthur M. Sackler Gallery
Designed in the Postmodern style (aka sleek and simple), the Sackler Gallery is 57 foot below ground, with the kind of staircase you see people in ball gowns walk down during movies. A passageway connects it to the Freer Gallery of Art, skylights keep away the introvert-looking-at-art-and-being-socially-awkward vibes, and a reflecting pool at the bottom ensures it’s classy enough for schmoozy events. Check out the 8,000-plus works of art it houses from China, Japan, Korea, Iran, India, and Southeast Asia.