The Roman thermas, the Korean jjimjilbang, the Russian banya, and the Turkish hammam. The bathhouse has been a staple of different cultures for thousands of years. People entered steamy saunas and chilled pools not only to cleanse their bodies, but to heal a variety of ailments and socialize with their neighbors.

This tradition continues today thanks to spas like Body By Brooklyn, which takes that time-honored sauna tradition and combines it with all the amenities of a high-end luxury day spa. Here, people can relax in a soothing Swedish sauna or take alternating dips in the thermal hot tub and cold plunge pool to rejuvenate their bodies. Afterward, they can enjoy a host of facial and massage therapies or relax in a martini lounge with full cocktail service and free Wi-Fi. There's even a VIP suite perfect for couples or parties, where guests can book in-room spa treatments and bottle service.