"With six thermal pools, a large swimming pool, a wellness area, and an oft-Instagrammed rooftop jacuzzi, Rudas has been a full-service spa bathhouse since its restoration and renovation in 2014. Its center, however, reveals a centuries-long history: the octagonal pool under a domed ceiling and surrounded by old stone vaults and pillars, dates to 1550, the Ottoman occupation of Budapest, and is thus literally steeped in history. Though it initially only served men, Rudas now separates genders on weekdays (Tuesdays are for women) and offers coed bathing on weekends. Tip: single-gender bathing can be fabulously pressure-free and almost spiritual; Rudas is the only place that this is still possible. And Fridays and Saturdays, Rudas stays open until 4a.m. Tickets can be booked online."