Tourist exit sign
A brown sign with an arrow pointing diagonally up and left, and the following text.
Cheddar; The Gorge & Caves [English tourist board symbol] Wookey Hole; The Caves & Mill [English tourist board symbol] .
Tourist destinations are starting to appear with great regularity now, not least this pairing at junction 22. Not everything worth seeing around here is underground but you could be forgiven for wondering if it is.