Dry Dry Railroad
From the Super Mario Wiki
Dry Dry Railroad is a train line used in Paper Mario. Its one end is in the south part of Toad Town. Its other end is at the foot of Mt. Rugged. To ride it, Mario must destroy the rock blocking the railroad with Bombette. The ticket master thanks Mario for his effort and gives him a free pass to ride the train, K64. After riding, he reaches his next destination, Mt. Rugged.