Thurston Lava Tube is located on Big Island in Hawai'i Volcanoes National Park.
https://www.nps.gov/havo/planyourvisit/craterrimtour_tube.htm
This tube was discovered in 1913 by Lorrin Thurston.
It is a little over 600 feet long and the height varies from 10 feet to nearly 30 feet.
Complete Walking Tour of Thurston's Tube
https://youtu.be/XvVWMRNc93Y
An unplanned but must see stop along the way!
The walk leading up to Thurston's Tube
https://youtu.be/qQuzKNN08L8
More anon....
