What's a significant metaphor in Fun Home?

Bechdel uses the creek from which Beech Creek takes its name as a metaphor for her father's homosexuality, which he attempted to hide behind a polished exterior. She writes that the creek appeared "crystal clear" (128), but this was only because of pollution from the adjacent strip mines.

Another example can be found when a sudden summer storm hits Beech Creek. Despite the storm's fury, it does not do any damage to the Bechdels' home - it just fells the trees around it. "In this light," Bechdel writes, "the ring of downed trees conveys a theme less of destruction than of narrow escape" (179). She uses the storm as a metaphor for Bruce Bechdel's brushes with the law, and in a broader context, for the way her father's secret whipped up chaos around the family. However, she acknowledges that despite these struggles, the family did avoid complete destruction, likely because they were well versed in how to weather a storm.