Onsen Ryokan Yuen Shinjuku is a hot spring ryokan-style hotel a short walk from Shinjuku-sanchome Station. The large bath on the top floor has an open-air tub where guests look out over the Tokyo night sky, and use of the bath has no time limit. Free ice cream is served after the bath, and some guest rooms have tatami floors. Rooms have no windows, are small, and contain a lot of dust.