- Spada Lake - Culmback Dam (wta.org)
Culmback Dam and Spada Lake are a lovely retreat off Highway 2, just east of Sultan and up the Sultan Basin Road. Spada Lake is a source of drinking water for the City of Everett, so in-water activities are prohibited, but there are hiking trails that circle the lake and nearby just waiting for your exploration.
- Gabriel’s horn (Wikipedia)
A Gabriel’s horn (also called Torricelli’s trumpet) is a type of geometric figure that has infinite surface area but finite volume. The name refers to the Christian tradition where the archangel Gabriel blows the horn to announce Judgment Day. The properties of this figure were first studied by Italian physicist and mathematician Evangelista Torricelli in the 17th century.
Glacier Peak, WA simplified hazards map (usgs.gov)