Onyx Cave (Arkansas) 02 Jul 2025
Onyx Cave is a small show cave located about 6 miles (9.7 km) east of Eureka Springs, Arkansas. It has been a tourist attraction since 1893, making it the oldest show cave in Arkansas. The cave does not contain onyx, but rather flowstone, also known as "cave onyx". During the 19th century and the beginning of the 20th century many such caves were named similarly.
Onyx Cave (Arkansas)