Krol Ko is a little sanctuary found just toward the north of Neak Pean. It might have filled in as a house of prayer at a healing center site, as its design is indistinguishable to the four doctor's facility churches found outside Angkor Thom (the 'Sanctuary of the Hospital' toward the east, Ta Prohm Kel toward the south, Tonle Sgnout toward the north, and another site now in remains toward the west). Situation of a doctor's facility near Neak Pean would have appeared well and good as Neak Pean was developed as a portrayal of the waters of the legendary lake Anavatapta, which were thought to cure sicknesses. All the more unsurprisingly, seven of the sanctuary pediments at Krol Ko highlight Lokeshvara, the boddhisattva of recuperating, who was usually connected with healing centers.
The sanctuary structures – a tower and a supposed "library" – are encompassed by two dividers. The reason and capacity of "library"- structures, which are very regular in Khmer engineering, are obscure. The primary sanctuary tower of Krol Ko is implicit the center of a cross-molded porch.
The most intriguing things at Krol Ko are the pediments on the ground. Some of them are reestablished, similar to the triangular pediments with Avalokitesvara remaining on a lotus encompassed by lovers or the one with Krishna who lifts Mount Govardhana with his little finger to offer safe house to the shepherds.