The Stone Bridge
From Homestar Runner Wiki
The Stone Bridge is mentioned in the Strong Bad Email "personal favorites", where Strong Bad recalls Pom Pom and Coach Z having a knife fight there. Also, in Date Nite, Marzipan and The Cheat are seen standing on the bridge watching fireworks. While they were doing so, Strong Bad and Homestar Runner attempted to ruin their date in a small cardboard box (dubbed the "USS Flirtini") with those exact same fireworks but their plan backfired. It was the USS Flirtini's final voyage.
In Thy Dungeonman 3, the description for an arched stone bridge claimed that they were famous for their knife fights.