Structure Coordinates

Java:

Village at (576, 320)

Shipwrecks at (-320, 96), (32, -496), and (288, -368)

Ancient City at (-256, 96)

Trial Chambers at (-320, -336), (16, 176), and (544, 128)

Bedrock:
Village at (-184,184)

Ancient Cities at (-136, 312), (40, 136), and (-216, 104)

Trial Chambers at (-320, -336), (16, 176), and (544, 128)