There are leaked pipes in a ground pipes, hence the name. You can build only land towers on quadrilateral and rectangular, browny places. There is one entrance and consists of four exits. The path goes like this; The first round (wave of bloons) will exit in the nearest one; the second round will exit the nearer one than the first exit; the third round will exit the nearer one than the first and second exits; the fourth round will exit normally in track (not in leak). This track is look like Switch in BTD5, but differ in pathways. There are drops of water, but it is the path of bloons. So, No body of water in this track.