The Tank at Kosikalan (Pathwari Mandir) is a historic water tank located about 140 metres west of the old Grand Trunk Road, in the centre of Kosikalan town, Mathura district of Uttar Pradesh, with Sarai Kosi (rest house) lying to its southeast. Of uncertain date and patronage, the rectangular tank is built of lakhori bricks, red sandstone, and lime mortar and is lined with ghats on all four sides, including octagonal extensions, a chhatri on the northern ghat, and small shrines on the southern ghat. The tank is unprotected and, while still used by local residents for daily and religious activities, suffers from poor maintenance of the ghats and deteriorating water quality due to garbage disposal.