Down The Drain

Down the Drain '''is an Expert track in BTD6. It was released on 19 March 2014, same as Lobby, a Beginner track. (Unlocked at Rank 45)'''

Overview
An earthy track composed of 4 pipes connected to a pool of water. These pipes are the bloons' paths. This could be a very hard track since it is composed of 4 paths (entrances and exits). At first, bloons inside the well went out of it, merging into 4 paths, then turn around the pipes the same time as they exit the same time, too. You can build Buccaneers on that well.

Trivia

 * This is the only track to have 4 paths that bloons appear together, with 4 entrances and exits. Others being Country Road and The Eye, but one-by-one path appearance of bloons.
 * This could be arguably the hardest track in Expert Difficulty.
 * This is the 2nd Expert track to contain water for water towers. First being Castle.