Disney World once had a separate theme park on a private island called Discovery Island that was focused on birds and fauna. It closed in 1999.

Today, the abandoned park remains guarded and no one is allowed on. But a few people have snuck on to capture video of the decaying park.

The pictures and videos show a decrepit snack bar, a ruined animal hospital, and an eerily quiet loading dock.

Disney World is marketed as a place of wonder, excitement, and magic. But, there's a secret side of Disney the company doesn't want you to see.

On the official map of Disney World, there is a blank green mass in the middle of Bay Lake in Orlando, Florida. The mysterious island is not labeled and no one is allowed to enter — not Disney World guests and not even Disney World employees. But two decades ago this unlabeled island was actually another Disney amusement park called Discovery Island. It mysteriously closed in 1999.

For nearly 20 years, Discovery Island has remained under lock and key, people banned from stepping foot inside. But a few years ago, YouTuber Matt Sonswa snuck onto the island to capture the park in ruins.

This is what he saw.