Rubble Spring is a massive area that can be found in the Frontier. This area borders the following areas: Hoodlum Falls, Great Pine Forest, Ancient Forest, Topple Lake, and Greenhorn Grove. This area is notably known to host a variety of rivers and springs for players to fish at.
Rubble Spring is also known for the cottage near the spring, the house where Martin the Carp lives. Martin the Carp is a fisherman that will sell two fishing rods that the players can purchase from, the other one being Luhr. The players may fish in the spring near the building where few mobs will attack the player. The "Death Portal" can be found at Rubble Spring, further away from Martin the Carp's cottage. This "Death Portal" serves as a portal to the pillar in Greenhorn Grove, where Collectus can be found.