 In
the area with the statues open the wall at the back of the left middle
platform. |
 Jump
up into the dark niche with the skeleton. |
 Blow up the
stairs with the crack, then jump up to the top of the ruined stairs. |
 Jump onto the
pedastal with the dragon figurine near the bronze-key door to open a teleporter
to the area over the serpent mini-boss. |
 After using
the lever, swim down the water and surface in the first rectangular area. |
 Near the finish
of the level climb up the vines to the ledge and hit the switch. Then go
back near the gold-key door, press the switch at the bottom right of the
stairs to open the painting and reach the entrance to secret Level
21, "Shanghai Shipwreck". |