The (main?) sink for the water running down the Tesugo valley. Other sites probably associated with this are 4883, 4884 and the probable resurgence, site 4885. Although there is only 170m straight line distance between this sink and the probable resurgence, there is potential for inlets entering from under the steep valley sides so the "system" may well warrant further investigation.

References: anon., 2019b (Easter logbook)
Entrance pictures : April 2019
Underground pictures :
Video :
Detailed survey :
Line Survey :
On area survey :
Survex file :