Forest Hill

Forest Hill is a location that appears in the anime series Sonic X. It is a forested area where Eggman took shelter in for some time.

Chaos Emerald Saga
At some point in time, Eggman took shelter here in order to avoid his enemies, although Knuckles became aware of his location when he saw his ship there.

Later on, Knuckles would visit Forest Hill along with Chris in order to negotiate with Eggman in cooperating with Sonic and the others in order for them to return to their home world. Eggman agreed, but on the condition that Knuckles hand over the six Chaos Emeralds he had to Eggman for safe keeping. Knuckles agreed, but it only turned out to be another trick of Eggman's, who quickly dropped Knuckles and Chris out of his ship upon getting the 7 Chaos Emeralds.

Soon afterwards, Sonic arrived on the scene in order to stop Knuckles, having found out about Knuckles' intentions, though he was too late to stop Eggman from taking the emeralds.

Rouge, Topaz, and a handful of other GUN personnel had also arrived in an attempt to take the Chaos Emeralds for the President, though this plan was ultimately fruitless.