Just as the player can scroll up to see higher-numbered floors in their tower, they also have the ability to scroll down underneath the Lobby and look at the foundation of their Tiny Tower. Deep pylons are set in the ground to steady the player's ever-growing tower, with strange bits, bones, and trash buried as well. There are varying opinions on what the skeleton belongs to, but that is left to the imagination.
There are several extra images beneath the Tiny Tower Foundation since the last update on this page. See the second screen capture updated as of July 16, 2016.
Long Green Water Pipe