Have you become curious about who soaked in the tub filled with spring water, before you use it?
If enough amount of water has been continuously poured, there would be no problems, but sometimes you may well feel uneasy.
Some of spa facilities with plenty of water, contrary to your concern, replace their water of private tubs every time people use it.
New Mexico, Rating [4/5] Lodging, Private Bath, Sauna, Sightseeing, Truth or Consequences
What is the definition of hot springs?
As long as spring water is hot, can we call it a hot spring?
Japan has the Hot Springs Act.
According to the law, the natural monument in a southern island can be called a hot spring.
Kyushu-Okinawa Region, Rating [1/5] Hot Spring River, Secluded, Tepid
Do you know big spa cities near Los Angeles?
The city’s name is Desert Hot Springs.
Such well-known city has, beyond expectation, excellent hot springs.
California, Rating [3/5] Extremely Hot, Lodging
Do you know a hot spring river of milky-white water?
The impressive spot must be one of the best hot springs with an exclusion of the fact:
You will have the brush with death from toxic gas.
Hokkaido-Tohoku Region, Rating [5/5] Extremely Hot, Hot Spring River, Opaque, Secluded, Sulfur Dioxide
Do you know a hot spring where is free of vanities?
This underground bathroom does not have even a window, and it may look barren.
However, the room reached the functional beauty, by pursuing goals for providing hot springs in the best condition…
New Mexico, Rating [4/5] Lodging, Private Bath, Truth or Consequences, Upwelling from the Ground