From St. George take SR9 to Virgin.Turn left at Virgin to Kolob. Proceed to Leftfork trail head. Begin you 10 mile round trip hike you will never forget.
Sandstone carved out by the power of massive amounts of water over the years to form a shape of an almost perfect tunnel. Absolutely amazing and a must see if you are in the Zion area and up to a strenious hike. Permit required.