Spectacular sinkholes in the world

Sentinel-2 MSI acquired on 25 April 2019 at 02:55:51 UTC
Sentinel-2 MSI acquired on 04 September 2019 at 16:08:29 UTC
Sentinel-2 MSI acquired on 14 October 2019 at 17:02:51 UTC
Sentinel-1 CSAR IW acquired on 16 October 2019 at 00:41:10 UTC
Author(s): Sentinel Vision team, VisioTerra, France - svp@visioterra.fr
Keyword(s): Ocean colour, blue hole, sinkhole, Belize, Mexico, Paracel Islands
Fig. 1 - S2 (04.09.2019) - 4,3,2 Natural colour - The Great Blue Hole located near Belize is more than 300m in diameter and 124m deep.
Fig. 2 - S2 (24.02.2019) - 8,4,3,- El Zacatón is a 339m deep sinkhole located on El Rancho Azufrosa in Mexico.
Fig. 3 - S1 (16.10.2019) - VV,VH - El Zacatón sinkhole is one of the filled with warm and mineralized water in this area.
Fig. 4 - S2 (14.10.2019) - 4,3,2 - The Dragon Hole is 300.89m deep and more than 100m in diameter in the Paracel Islands, South China Sea.