BUG NOTE: There is a potential bug in this area that can prevent you from getting the next secret, so I recommend saving the game before exploring this area, just in case. See the footnote in the main walkthrough for details.

At the top of the ladder, a long narrow hallway leads to a pedestal with another TRIDENT (4/4). You'll also notice several small, white piles of bones. In order to get the next secret, you must destroy all 5 bone piles. The first of these is just at the top of the ladder.

To destroy it without wasting explosives, draw the shotgun, stand on with Lara's toes on the seam between the tile with the bones and the adjacent empty tile, hold Look and tilt the camera downward toward the bones, then fire.

Or use the crossbow + laser sight with regular arrows to destroy the bones.

Jump across the hole in the floor and destroy 2 more bone piles in the hallway leading to the pedestal room.

The remaining 2 bone piles are to the right of the pedestal and in the alcove behind it. The 3 skeletons here won't animate until you take the TRIDENT, so you can either blast them, along with the bone piles, using grenades or explosive arrows, or shoot the bone piles and wait to deal with the skeletons.

When you have destroyed all 5 bone piles, the tile in the northwest corner of the pedestal room sinks into the floor. Drop down through the opening...

...for SECRET #2 (46/70), explosive arrows.

When you approach the arrows, a brief cutscene shows the brown door opening down in the ROOM WITH LEDGES AND CIRCULAR SKYLIGHTS - UPPER LEVEL.

Climb back out of the secret area and take the TRIDENT (4/4). If you haven't already destroyed the 3 skeletons with explosives, they will animate now.

If you're out of grenades and explosive arrows, you can lure them to the opening above the climbing pole...

...and knock them in with the shotgun.

[Catacombs Walkthrough]