Reached on foot from the southwestern shore of Chiaw Lan Lake, Tham Nam Thalu contains striking limestone formations and subterranean streams. It is only partially accessible during the rainy season and we don't recommend visiting then; there have been fatalities due to flash flooding. You'll need a guide at any time of year; this can be arranged at the Khao Sok National Park Headquarters.
Tham Nam Talu (Nam Talu Cave) is located in the area of the Protection Unit at Kor Sor 4️(Khlong Pae). Traveling by boat from Ban Chiew Lan Municipal Tourist Pier to the Protection Unit at Kor Sor 4️(Khlong Pae). about 1️ hour and then take a boat to the starting point for about 1️5 minutes, walk to the mouth of the cave about 3️ km.
Tham Nam Thalu is a large cave. The orientation of the mouth of the cave to the end of the cave in the southeast direction to the northeast direction, the mouth of the cave is 3'0 meters wide, inside the cave about 1'0-30 meters wide, the main hall is 77.6 meters long.
Inside the cave is a recess. The mouth of the cave has water that flows from the watershed of the limestone mountains from the northeast all year round. Characteristics of rocks at the mouth of the cave are limestone clusters scattered throughout the area. There is water flowing through the mouth of the cave traverses to the end of the cave. The high and low water levels are different. Some periods shallow water flows slowly. At the end of the cave there is a waterfall. The water is deep and flowing.
Inside the cave, there are stalactites and stalagmites scattered throughout the cave. Each point has a different beautiful shape. There are also groups of giant-faced bats, wandering spiders, whip spiders and cave crickets. where tourists must have a guide to lead the way only
Tham Nam Thalu tourism is closed from 1 June - 3 November every year. because the water is high in the cave because of the rainy season harm No car pole can walk inside the cave.