Bridge

Bridges are a common obstacles in the Pikmin series. They are found as a pile of wood on one side of a gap or body of water, which Pikmin can be set to work on. Doing so will cause the wood to be constructed into a bridge that spans the obstruction. In Pikmin 2, there is a bridge that is surrounded by poison, just like some gates. Naturally, only White Pikmin can approach it, but once a few segments have been built, the poison pipes may be destroyed, allowing other Pikmin to assist them in completing the bridge. Bridges appear above ground only.

In Pikmin 3, bridges are instead made of Fragments that are brought from elsewhere in the area.

Pikmin: Attack of the Breadbugs
Bridges act like they did in Pikmin 1 and Pikmin 2. They can be found occasionally in the Land of Wonders, more specifically the Marsh Territory and the Arctic Territory.