Glacial Cavern - Ice Ship Challenge Tomb (Part 1)

The entrance to this area is described in the main walkthrough and shown in the previous set of screenshots.

Walk out to the end of the wooden ledge and jump to grab the bar above the red banner. Then climb onto the wooden mast above.

Walk forward along the mast. When you reach the ship's deck, climb onto the ledge above.

Use your axe to pry the large hook off the metal gear assembly.

This lowers an ornate golden bucket full of ice off to your right. Go around to the left, look inside the cylindrical container for some herbs, then scramble up the wall onto the mast above.

Walk all the way out to the end of the mast, then onto the spar that juts out to the left.

Jump from the end of the spar to grab the handle on the bucket...

...which then swings forward, smashing the ice wall ahead.

Wait for the bucket to settle before dropping down onto the ledge below, or Lara will fall into the chasm instead.

Examine the document (2/4) sitting next to one of the skeletons. It is titled Impossible Pursuit and belongs to the Glacial Cavern series. It confers Greek language skill along with XP. Pick some mushrooms miraculously growing out of the frost near the other skeleton.