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Svatojánský okruh

Accumulation of freshwater limestones

At the estuary of the karstic gorge, from the western and nothern side of the church formed at the youngest time of Holocene (2700 – 8000 years ago) a big accumulation of travertines (cold and freshwater requiring limestones). These rocks precipitated, also under interaction of plants, from saturated karstic waters, which bubbled out not far from limestone massif. The power of the travertine cluster and completeness of the encountered geological profile are unique, compared to similar outcrops in the republic and demonstrate character and evolution of the natural environment and clime of the area in the youngest history.
In freshwater limestones originated caves, where lived in the 9th century legendary hermit Ivan. Later here was built a church and even later Benedictine monastery. It is possible to go to the cave hermitage from the main area of the church.
Waters, which gave rise to this phenomenon bubble out today in thw total amount of 17 – 30 l/sec. and with almost permanent temperature 11,4°C from the various places of traventine ensemble in the church, at the church garden and even at the monastery’s boiler room whence is needed to drain them away. The water was at the breakthrough of the 18th and 19th century drawned and selled as curative.
In the environment of the groundwater lives here a miniature shellfish bathynella natans (2 mm) which wa for the science for the first time discovered in the Prague wells in the second half of the 19th century when aroused a big splash in the scientific circles.
On the rock walls nests Eurasian Eagle-Owl (Bubo Bubo).

GPS position

N 49° 58.130', E 14° 8.037'



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