Wellspring Cave (Japanese: 地下水脈の穴Underground Waterway Opening) is a cave in Unova which lies in the northwest corner of Route 3.
In Pokémon Black and White, when first entering the cave, the player and Cheren will encounter and battle four Team Plasma members. Once the Single and Double Battle are won, the player and Cheren are told by Team Plasma that they plan to steal Pokémon in order to liberate them from humans, who according to the Plasma members, are making Pokémon suffer. Players can obtain TM46 (Thief) in the entrance cave, but cannot proceed further without Surf. Flash is optional for the basement level.
Wellspring Cave earned its name due to its collection of underground water wells. Rainwater seeped through the soil as groundwater and pooled into wells hidden within the earth, gradually forming springs. Water droplets trickle frequently from stalactites across the cave, indicating its contribution to the formation of the springs.
The first floor is a small area divided into two rocky shores separated by an "L"-shaped pool in the center of the room. Without Surf, the player can only access the northeastern section of the first floor. Once acquired, the player can move across the body of water to the southern strip of land and descend into the lower section of the cave.
The lowest layer of Wellspring Cave is roughly twice as long as the previous floor. Without any natural light source, the bottom level stays in darkness, though Flash be used to nullify this effect. Like the first floor, a large body of water is situated to where it sections off parts of the floor. A landbridge between the bigger spring and a lesser one leads into a huge section of land with rugged terrain. Black Belts and Battle Girls can be found training within the rocky surface, but can be avoided altogether by surfing on the lake to their left. At the northern end, a small section of land can be reached.