an outdoor bath, often at a naturally occurring hot spring

relaxing

to relax

place, location / site (location designated for some purpose) / space, room / a seat / (sumo) tournament

the highest; the best; supreme; the greatest

nature / spontaneity

natural / spontaneous

naturally / spontaneously / rarely / coincidentally

inside

中々: very, quite, considerably, rather, by no means (with negative verb)