The sleepy hamlet of Lumshnong village came into lime-light recently when it has been confirmed that the Umlawan cave situated in this village is the longest and also the deepest in the sub-continent. Meghalaya takes pride in housing the sub-continent's deepest and largest caves - the Umlawan Caves. The Umlawan cave is interconnected with two other caves namely Krem Kot Sati and Umskor caves. The total length of these caves is more than 21 kms and about 100 m in depth. This place is 60 kms East of Jowai. Dotted across the entire district there are numerous caves and caverns with spectacular stalagmites and stalactite formations. Till now only a few of these caves have been explored and surveyed.

It is used as a washing place by the villagers. One needs to swim to enter the cave. During the monsoons the entrance is submerged. Kotsati - Umlawan Cave system is a network of many caves like Krem Kotsati, Krem Umtyongai, Krem Umsynrang Liehwait, Krem Wahjajew. Krem Lalit, Synrang Thloo, Krem “Washing Place Inlet,” Krem Umshor, Put Lyer,Garage Pot, Thloolong Kharasniang and the thirteen other entrance of Krem Umlawan. With 24 entrances, both horizontal and vertical, no part of the cave is more than one hour away from the nearest entrance.

Innumerable stalagmites and stalactites add to the look of these caves. This area lies in West Jaintia Hills district of Meghalaya which attract large number of tourists from different places. It is a great adventure to crawl through the narrow opening and walk all through the darkness, amidst the projecting the stalactites and stalagmites. These caves have a rockier path than the more popular Mawsmai caves however were much more fun to explore. They have much larger pathways than Mawsmai being more suitable for claustrophobic people. They also have gastropod fossils inside which are something new to look at.