Geothermal Valley - Catacomb of Sacred Waters Challenge Tomb (Part 1)

When you reach the Aqueduct Ruins Base Camp, as described in the main walkthrough, move down between the broken bridge sections.

Then walk up the fallen tree trunk and jump into the tunnel to the northeast.

Follow the tunnel. Where it widens, there are some mushrooms and a box of supplies. Continue up the stone stairs.

At the top is a small cavern with stalagmites and stalactites. Follow the flowing water downstream.

Swim across a shallow pool and walk through the waterfall ahead.

Then slide down the steep slope to splash down in the pool below.

Climb out of the water on the right (north) side. Then climb through the narrow gap in the rocks into the cave beyond.

Use an arrow to make a rope line so you can cross the next pool.

Descend the next flight of stairs into a large room lined with bones.

Between the two large columns with skulls arranged around their bases is a relic (6/13), a Silver Basket from the Time of Adaptation set.

Climb onto the ledge to the left of the relic...

...and follow it up and around to the Aquifer Cavern Base Camp.