This is an expression used to describe an activity or action that enhances one's awareness of different cultural practices. This can be trying different foods, bungee jumping, traveling etc.
"Let's go watch the sunrise tomorrow."
"Why the fuck would we do that?!"
Come on, you obviously need a little cultural enrichment!
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 $2million.