Portal to Another Dimension is a track in which the bloons have opened a portal to another dimension. Most of the track is land, but in the center of the track is an area of Warped Spacetime. The path of the bloons goes around it, but other bloons can randomly pop out of the portal occasionally. You may place towers on the portal, but they will be subject to the effects of Warped Spacetime (potentially disappearing and maybe reappearing randomly, changing the type of tower they are, and so on). Sometimes, towers may appear on the portal for no apparent reason. Basically, anything that goes onto the portal can be affected, but bloons and towers that are not on the portal will not be. If you complete this track, you get $350 Monkey Money.