There's nothing quite like transitioning from Crescent Lunge to Warrior II while a giant sawfish shark swims right at you. The Downtown Aquarium currently offers this unique yoga experience on select Saturdays at 8:30 a.m., with several upcoming opportunities to unroll your mat in front of a gigantic tank. The class is limited to yogis sixteen and older — remember: sharks right up in your face — and the fee is only $15. For less than the drop-in rate at many yoga studios, Yoga With the Sharks gives you a workout and a show.