Mystic Ruins is a swampy, overgrown rainforest, grass and fern-like bushes, and there are both rushing rivers and calm lakes that run between the mountains. Inside the Mystic Ruins is one of Dr. Eggman's facilities and the location of a small wooden structure that is Big the Cat's House.h
Big's Big Adventure
In the Mystic Ruins, Big relaxes at his house and watches the sunset with Froggy. He states that no matter how many times they have seen it, it was still pretty and asks if Froggy agreed; the frog simply responds with a ribbit, to which Big agrees with. The cat then mentions that he has not seen it in a while as Froggy had led him on a long adventure. Now caught up and as the moon rose, Big tells Froggy that he knew the rest as his tale had finished and they were home safe and sound. Noting that Froggy had been quiet ever since they got back, Big claims that since they were such good friends, he already knew what he was thinking; he tells his pal he was happy to be home with him as well.
Unbeknownst to Big, as Froggy had come in contact with the Metal Virus during their fight with Zombots in Spiral Hill Village, he slowly becomes a Zombot and begins infecting Big. The virus gradually spreads to the flora of the Mystic Ruins as well.