Most pilgrims who climb to the abbey on Łysiec come for what they can see: the old monastery church, the chapel of the relics of the Holy Cross, and the wide view over the forests of the Holy Cross Mountains. Very few know that beneath their feet, under the hilltop, lies a set of old water cisterns that almost no one has entered.
A new audio report from Radio Kielce has brought this hidden place back into the light, and it is worth knowing about before your next visit.
What lies beneath
The cisterns are underground reservoirs cut into the summit of the hill. They still hold water, which today serves as a firefighting reserve for the abbey and its buildings. Explorers who have reached them describe a large, silent, flooded space, so impressive that one compared it to a church beneath the church.
Only a handful of people have ever been down there. One local enthusiast organised an expedition more than twenty years ago, and the Radio Kielce team joined the small group of visitors for their report.
What we know, and what we don’t
Surprisingly little. The reservoirs were briefly examined by an engineer from the monument conservation service in 1964, and since then almost nothing has been documented. When and how they were built is still an open question, and researchers, including an archaeologist who has surveyed much of the hill and one of the Oblate Fathers who has searched the archives, agree that the site deserves a proper professional survey.
That would mean testing the building materials, examining the floor, and perhaps pumping out the water to see what lies underneath. Because part of the cisterns runs beneath a road, understanding their condition matters for more than history alone.
Why it matters to pilgrims
Święty Krzyż has always been a place of hidden layers: a pagan sanctuary before it was a Christian one, a Benedictine abbey that kept a relic of the True Cross through centuries of war and change, and today a living place of prayer cared for by the Oblate Fathers.
The cisterns add one more layer. For centuries, water on a dry hilltop meant life for the monks who lived there. It is a quiet reminder that every pilgrimage site depends on unseen work, by builders, keepers and caretakers whose names are mostly forgotten.
If you are visiting
The cisterns are not open to visitors, and you should not try to find a way in. But you can still sense this hidden side of the mountain:
- Walk up the Royal Road (Droga Królewska) from Nowa Słupia to the summit, the traditional pilgrim route to the abbey.
- Visit the basilica and the Oleśnicki Chapel, where the relics of the Holy Cross are kept.
- Take a moment at the top to think about the water below, and the many generations who made this place a home for prayer.
Listen to the report
The full report, in Polish, is available from Radio Kielce, along with photos and a short video from inside the cisterns.
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