Jedlovská kyselka, Mineral water spring in Stará Voda, Czech Republic.

Jedlovská kyselka is a natural mineral water spring located in Stará Voda at approximately 600 meters elevation. The water emerges naturally carbonated from underground and maintains consistent mineral composition throughout the year.

In 1920 the Mariánské Lázně businessman Hans Haubner bought the land with the spring, repaired its capture and renamed it Kristův pramen (Christusquelle); the new name did not catch on. The town of Mariánské Lázně later bought the spring but did not use it, and it stayed open to the public. After the First World War it was covered with a small roof and enclosed by a low wall; after 1989 it was sheltered by an open wooden pavilion 3 by 3 metres, with a plank walkway and footbridge over one branch of Kosový potok.

The name kyselka refers to the acidic, carbonated mineral water; locals call the spring Kyselka v Jedlové. Hans Haubner renamed it Kristův pramen (Christusquelle) in 1920, but the name did not stick. An information board by the wooden shelter gives the spring's history and chemical composition and warns that the water's quality is not regularly monitored, so drinking is at your own risk.

The spring is accessible via marked walking paths throughout the year and can be visited at any time. Dedicated spaces near the source allow visitors to fill their own containers conveniently.

The water becomes carbonated naturally underground through geological processes, without any artificial enrichment. This spontaneous carbonation makes the spring particularly distinctive and valued by those who collect its water.