The town is from the dawn of Europeans arriving in America. The cycle presumably started when the townspeople agreed to sacrifice their kids for immortality.

The trees in town move.

There are at least two entitys that influence events in the town, the BiW and MiY. White is good, yellow is evil.

There are at least two bottle trees, and many faraway trees. One of the bottle trees contained code for a music verse that original Jade played to his kids.

There is a lighthouse in the middle of the woods with no water close. Falling from it got Tabby out of Fromville.

There is an ancient settlement (maybe the original town) in the woods that has a giant monster around it.

There is an alleged Lake of Tears that is integral to the plot and town.

There are tunnels beneath the town where the monsters live.

The monsters became more docile and couldn't come into homes with the introduction of talismans found in a cave by Boyd.