The Sourdough Caches
A treasure hunt narrated by a porcupine with boundary issues
The Sourdough Caches is a narrated GPS treasure hunt hidden along Juneau audio tours. Solve riddles, walk to the spot, and unlock narrated stories from a cast of very opinionated Alaska animals. It plays 100% offline — perfect for keeping kids busy on a cruise port day.
What makes it different
Works 100% offline
Downloaded tours need zero cell service — including the hunt, journal, field guide, trivia, and passport. Built for Alaska, where the signal quits.
Private by default
Photo and sighting locations never leave the phone. No ads, no data selling, and no account required for any free feature.
Hints are always free
A four-step hint ladder gets you to every cache. There are no in-app purchases inside the hunt itself — no pay-to-win.
Narrated in six languages
Every cache story is fully narrated in the app’s six languages: English, German, Spanish, French, Japanese, and Chinese.
How a hunt plays
- 1Hidden caches are scattered along a tour — invisible on the map, each with a riddle.
- 2Solve the riddle and walk to the right spot. Stuck? Free hints: the riddle, a written hint, a “warmth meter,” then distance and direction.
- 3The cache unlocks with a celebration and a professionally voiced story told by that character.
- 4Miss a few? The app tells you what you missed so there’s a reason to come back next time you’re in town.
Some caches show how rare they are — “only 8% of explorers find this one” — computed weekly from real find data, not made up.
Meet the cast
Each character has a distinct voice and recurs across tours — finding the same one in a new spot feels like meeting an old friend.
- Common
Sky Thief
Raven
- Common
Swamp Donkey
Moose
- Uncommon
Stab Rabbit
Porcupine
- Uncommon
Snack Rock
Sea Otter
- Rare
The Salmon Inspector
Brown Bear
- Rare
Singing Sea Bus
Humpback Whale
- Legendary
Angry Lunchbox
Wolverine
Things to do with kids
A Juneau cruise activity the whole family can play
Turn a downtown walk into a treasure hunt. Kids chase the riddles, everyone hears the story, and it all works with no signal — so it keeps going even when the bars don’t. No account, no ads.
Start hunting in Juneau
Every free Juneau tour includes a hunt, so you can try the whole loop before you buy a thing. Download the app to begin.