In Amber

 is a Sunless Sea Explore Random Event.

Trigger conditions
 can be triggered in Port Cecil by doing the following:

Event description
Some disturbance of the undersea has brought sunken ruins up out of the water. But these stones were lost beneath more than the sea: they are half-encased in a smooth translucent orange substance, like amber...

Even as you watch the ruins groan and shiver. The convulsions that brought them up will soon take them below again.