Sadový pramen, Mineral spring in Karlovy Vary, Czech Republic.

Sadový pramen is the twelfth mineral spring of Karlovy Vary, on the left bank of the Teplá River beneath the Military Spa Institute. It rises from a fissure in granite at 32 °C with a yield of 0.6 litres per minute and 750 mg of dissolved carbon dioxide per litre. Its original outlet is in the building's basement, in front of the statue of the Fairy of Healing Springs.

The spring was first recorded in 1852 when a spa institute was being constructed nearby and was originally called Imperial Spring. It eventually took on the name by which visitors know it today.

Originally named Císařský (Imperial Spring), it served with the Hochberger spring only for patients of the Military Spa Institute. The original outlet lies in the building's basement before a statue of the Fairy of Healing Springs, and a spring vase in the entrance hall was fed from a new borehole in the inner courtyard.

The spring rises in the basement of the Military Spa Institute in front of the statue of the Fairy of Healing Springs. For patients' convenience, a spring vase in the entrance hall is fed by a new borehole in the inner courtyard. The original outlet is not directly accessible from the Sadová colonnade.

The spring's high dissolved carbon dioxide, 750 mg per litre, gives it a pleasant taste but also causes intermittent flow: the spring sometimes stops and starts again. Its yield is only 0.6 litres per minute.