I've been passing by these street alcoves with rock build-ups for years and thinking, "Hey, Self, you should really hide a geocache in one of those things one of these days!" Well, today constitutes "one of these days"! You're searching for a micro a bit smaller than a bison tube and made of clear plastic. However, it's managed to sneak its way inside a bigger-than-micro object that blends right in with the surrounding crowd. Please make sure to place it back exactly where you found it and make sure it is snugly inserted into its host. Also, bring your own pen and perhaps a tweezers for log extraction.
Have fun and cache on!