Wat Tham Sua offers a cable car to visit the main level of the Temple. Once on the main level, there are still many steps to take for the determined traveler to get to the top of the large chedi adjacent to the large covered Buddha. The views are worth the trip to the top.
Wat Tham Khao Noi has a labyrinth of steps winding through the temple to the Pagoda. The Pagoda has also many spiriling steps to the top. But again, the work is worth it for the awesome views of both Wat Tham Sua and the Mae Klong River Valley.
The two temples are not connected, so to see both it takes a lot of work, walking to the top of one and then the other. To me the trip was well worth the fantastic views!