Editing Spring (hydrology) (section)

====Bathing and balneotherapy====
Hot springs or geothermal springs have been used for [[balneotherapy]], bathing, and relaxation for thousands of years. Because of the folklore surrounding hot springs and their claimed medical value, some have become tourist destinations and locations of [[Physical therapy|physical rehabilitation]] centers.<ref name="ARD">{{cite journal |last1=van Tubergen |first1=A |title=A brief history of spa therapy |journal=Annals of the Rheumatic Diseases |date=1 March 2002 |volume=61 |issue=3 |pages=273–275 |doi=10.1136/ard.61.3.273|pmid=11830439 |pmc=1754027 }}</ref><ref name="DOE">{{cite web |title=A History of Geothermal Energy in America |url=https://www.energy.gov/eere/geothermal/history-geothermal-energy-america |publisher=U.S. Department of Energy Efficiency and Renewable Energy |access-date=30 October 2020}}</ref>
[[File:Spring flowing through grass.jpg|thumb|Natural spring in Pennsylvania where runoff flows from above down through grass and rocks]]