Disclaimer: I didn’t map everything in the difference (like the lake was already mapped) but did add the tails and buildings.
Diff was generated using this tool: https://pierzen.dev.openstreetmap.org/hot/leaflet/OSM-Compare-before-after.html#16/41.9618/-73.7594
It’s quite easy to record tracks with your mobile-phone’s GPS when walking on those trails.