The Biggest Speleothems of the World

This is definitely not a ranking. It is just a list of extraordinary big speleothems of various kinds. Most of them are located in wild caves which are not open to the public, so they are not listed on showcaves.com.

Type	Size	Cave	Location	Explanation
soda straw	9.13 m	Wonder Cave	Gunung Mulu, Malaysia	Longest single soda straw
soda straw	9.03 m	Unnamed Cave	Mexico	Longest soda straw group, several straws over 8 m in the group
soda straw	5.43 m	Jewel Cave	Australia	The longest soda straw in an Australian show cave (probably worldwide)
rimstone pools	22 m	Actun Kotob	Belize	Tallest rimstone dam
rimstone pools	61 m	Tham Xe Bang Fai	Laos	Longest rimstone dam
rimstone pools	L=610 m, H=20 m	Wadi Sannur Cave	Egypt	Longest single rimstone dam formed on the surface. Wadi Sannur is a rare type of cave formed by roofing over of a giant surface rimstone dam at its spillover point. The rimstone dam was formed by a large thermal spring.
rimstone pools	400 m	TinazTepe Mağarları	Turkey	Longest connected rimstone pool series
cave formation	150 m	Lechuguilla Cave	New Mexico, U.S.A.	Flowstone cascade with greatest vertical extent, Neverland to Dead Sea
cave formation	17,700 m	Fort Stanton Cave	New Mexico, U.S.A.	Longest continuous formation, white calcite crust in a stream channel named Snowy River Passage
gypsum	1.98 m	Double Bopper Cave	Arizona, U.S.A.	Longest gypsum flower petal (supported)
gypsum	11 m	Cave of Swords	Mexico	Longest selenite crystal
Cave Pearl	290 m²	Gruta de las Canicas	Mexico	Some 200 million cave pearls cover the cave floor to a depth of more than a meter on 290 m², which makes this the biggest deposit of cave pearls.