Kapal Mochan, near Bilaspur in Yamunanagar district, holds three tanks and a fair at Kartik Purnima that draws several lakh people from Punjab, Haryana, Himachal and Uttar Pradesh.
Guru Gobind Singh Ji is recorded as having stayed there after the battle of Bhangani, and Gurdwara Manji Sahib is at the site alongside the Hindu tanks and temples and a Muslim shrine.
The whole eastern belt, Kurukshetra, Pehowa, Thanesar, Kapal Mochan, is a pilgrimage landscape older than any of the region's present religions, and Punjabi families have gone to it for centuries without regard to which tradition a particular tank belongs to.
Pehowa also holds the panda registers in which Punjabi families' genealogies are recorded.
These sites went to Haryana in 1966 and remain Punjabi pilgrimage destinations, which is one of the ways in which the 1966 boundary does not describe anything real.
The fair falls at the full moon of Kartik, in November, and the bathing is done at the three tanks in a set order over a night and a day. What brings people is the sequence rather than any single tank in it, and the order is fixed by custom with nothing written anywhere that says why.
The pandas at Pehowa keep genealogical registers arranged by district and got, written over generations. A Punjabi family can sometimes trace four or five generations through them and almost nobody tries.
Punjab's pilgrimage geography did not stop at the 1966 boundary. Families from the Malwa go east into Haryana for these fairs as they always did.