Boybuloq Cave
Boybuloq Cave (also known as Boy Bulok) is a limestone cave in Uzbekistan and the deepest known cave in Asia. It is located high in the Gissar Range of mountains, near to Dehibolo, Uzbekistan's highest village. The cave and wider area is inaccessible for much of the year due to snow. Long-known to local people because of a nearby spring the cave was first explored by speleologists in 1984. Since then expeditions have mapped of passages in the cave and reached a total depth of . The cave could potentially extend much deeper and become the deepest in the world.
Tuckaleechee Caverns
Tuckaleechee Caverns () is a set of caverns and AAA GEM attraction in Townsend, Tennessee, near the Smoky Mountains. The caverns were discovered in the mid-19th century and were opened to the public by Bill Vananda and Harry Myers in 1953. The caverns are known for the "Big Room", an immense cave/cavern room that a football stadium could fit inside. The caverns have stalagmites reaching 24 feet tall with flow-stone formations hundreds of feet in length and width.
Open MARCH 15 to NOVEMBER 15
Tuckaleechee Caverns also has the tallest underground waterfall in the country named "Silver Falls", a 210-foot two-tier waterfall. The cavern originates at White Oak Sinks in the Great Smoky Mountains National Park. The Caverns host a seismograph system monitored by the United States Department of Defense,CTBTO and the United States Geological Survey (USGS).