kept well hidden. Something great or perfect kept hidden 'til the correct time.
A butterfly, kept in the cocoon until the right time. When the right time comes the butterfly emerges, one of Gods most beautiful creations. "The Butterfly is kept under-wraps until Gods timing."
A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2 million.