Tham Phra Wang Daeng

{{Short description|Cave in Phitsanulok province, Thailand}}

{{Infobox cave

| name = Tham Phra Wang Daeng

| other_name = Cave of the Monk

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| location = Thung Salaeng Luang National Park, Amphoe Noen Maprang, Phitsanulok Province

| coords = {{coord|16.6806|100.6914|region:TH_type:landmark|display=inline,title}}

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| length = 13,789 m

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| discovery = 1997–2004

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Tham Phra Wang Daeng, also known as the Cave of the Monk ({{langx|th|ถ้ำพระวังแดง}}), is a deep cave located in Thung Salaeng Luang National Park, Amphoe Noen Maprang, Phitsanulok Province, upper central Thailand. It is the longest cave in Thailand, the distance is about 13 kilometers. Buddhist statues and relics, carvings and reliefs, a subterranean river, multiple bat colonies, and a trove of speleothems populate the cave.http://www.showcaves.com/english/th/showcaves/PhraWangDaeng.html SHOWcaveshttps://www.thailandcaves.shepton.org.uk/longest-caves TCaves In 2003, a biological expedition to the cave resulted in the discovery of new fish species, including discoveries in the Balitoridae and Cyprinidae families.https://www.researchgate.net/publication/270508267_Three_new_species_of_fishes_from_Tham_Phra_Wang_Daeng_and_Tham_Phra_Sai_Ngam_caves_in_northern_Thailand_Teleostei_Cyprinidae_and_Balitoridae RGate