Echo River

The Mucky Mammoth sailing down the Echo

The Echo River, often referred to as simply the Echo, is an underground river flowing out of Lake Lethe, and the central setting of Act IV.

Flora and fauna

Bats and insects are found along the river. In addition, multiple species of birds including the Lonesome Teal, American Gridpiper, Rock Sparrow, Gray-beaked Grouse, Mourning Hummingbirds, unidentified pigeon species, Painted Avocet, and Peat-breathed Riverbill.

Locations along the Echo

• A gas station
• The Rum Colony
• The Radvansky Center
• A phone
• A grove
• Echo River Central Exchange ("Consolidated Auxiliary Switch Number 30", and formerly the Echo River Avian Post)
• Sam & Ida's
• A neighborhood
• The Silo of Late Reflections
• The Iron Pariah
• Various shops
  • Trapper, Stalker & Sportsman
  • Gemini Canoe & Firewood / Gemini School of Beauty
  • The Sweater Shoppe / The Balloon Barn (formerly)
  • Ratliff Monuments
• Wayfinding points
  • Dinosaur Rock
  • Duck Island
  • The Lighthouse
  • The Story Cliff
• Various underwater islands
  • Slate Island
  • The Red Island
  • The Green Island
  • The Blue Island
  • Island Number 8192
  • The Uninhabited Island
  • The Entire "Seven (Plus or Minus Two) Islands" Archipelago
  • New Konigsberg
  • Skeleton Keys
  • Fancy Island
  • Tearless Rock
  • Part-time Island
  • Murphy's Weather Station Rock
  • Whippoorwill Islet
  • Rock of Magnets
  • Island of Trivia
  • Island of 60 KHz
  • Island of 350 and 440Hz
  • Island of Interfering Tones
  • Island of Eusapia
  • Despina Dockyards
  • Baucis Keys
  • Fish-Jaw Coral
  • Angled Island
  • Islet of Distraction
  • Endless Island
  • Soggy Island
  • Jerry's Island
  • Ted's Island
  • Nelson's Island
  • Serious Island
  • Island of Ringing
  • Undocumented Island
  • Overdraft Island
  • Islet of Overemphasis
  • Island of Heartsickness
  • Dog Shit Island
  • The Beasley Keys
  • Hermit Thrush Island
  • The Missing Island
  • Island of Cones
  • The Undefinable Island
  • Béton Island
  • Bear Island
  • Implied Island
  • Rock of Boredom
  • Loose-Tooth Rock
  • Water Tree Keys
  • Chorus Keys
  • The Doubtful Island
  • Island of Negative Space