Source: http://www.omantripper.com/wadi-tiwi-mibam-village/
Wadi Tiwi (وادي طيوي) is a wadi in Al Sharqiyah region, adjacent to the very popular Wadi Shab but unique in its own way with numerous farms and plantations dotting the wadi, and a stunning pool deep inside towards Mibam village (قرية ميبام). Wadi Tiwi, which is named after Tiwi village at the coast, is a truly beautiful wadi with the lush plantations giving it a different (certainly greener) feel than many other wadis.
I have visited this nice place in March 2017 and it was breathtaking. You can drive inside the wadi and then you can carry on walking. But be careful with driving, because we have broken our car lights in here.
About the cache
The cache is placed in small cave upon the water and its covered with a stone. You can park few meters from the cache.
USE FOTOHINT TO HELP YOURSELF.
Many thanks to Camel Master for maintance!