Hidden WDW has been online since 2011. The site was a spin off from a previous site Hidden DLRP. Both sites a focused on highlighting hidden details at Walt Disney World.
Details are located through out the parks and resorts. Some are more in your face film references others are environment building story clues. However, generally 99% of guests just walk straight past them with out knowing / noticing them. Looking on the ground or upon buildings are classic spotting locations. Well after all your more interested in spotting Mickey Mouse walking down Main Street in stead of noticing a Sewer cover that displays a Mickey reference.
I guess this site isn’t aimed at the first time visitor, it is more of the researcher / multi-stay guest.