What's a "remembered snag" in the context? Is there another way to describe it?

The sun had broken up the clouds and shone bright and warm for a winter day. As she steered them through narrow channels and glassy estuaries, he exclaimed at a remembered snag, the same as it had been, and a beaver lodge still piled in the exact spot.

Question

What's a "remembered snag" in the context? Is there another way to describe it?

The sun had broken up the clouds and shone bright and warm for a winter day. As she steered them through narrow channels and glassy estuaries, he exclaimed at a remembered snag, the same as it had been, and a beaver lodge still piled in the exact spot.

Answer

It's kind of a weird way of saying it, but I think it's just a snag that he remembers from previous experience.

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