Equinox Hudson Yards

This ultra-luxe gym chain is known for its amenities. But the Hudson Yards location has one of the best benefits around: outdoor individual saunas with a prime view of the city. The gym’s outdoor space, which sits under the glow of The Vessel, features a 10,000-square-foot pool and sundeck that’s outfitted with a couple of individual saunas for the winter where you can crank up the heat and sweat away any signs of chill you see through the windows. The space is only open to members of the gym and guests at the adjacent Equinox Hotel, but you can always join the gym, tag along with a friend, or book a staycation to check it out.