Due to the artificial nature of the planet there are no naturally occurring waterways, this problem is rectified by means of a comprehensive network of canals that are integrated into every metto. These canals in turn are connected to the deeper planetary infrastructure designed to circulate and manage water, including the hydroliths found in every metto. There are three primary types of canal: subterranean, terranean, and superterranean; in short they are: bellow the metto surface, integrated into the metto surface, and above the metto surface (similar to aqueducts), respectively.
In addition to the three basic types, there are several subtypes, mainly dealing with the way in which each canal manages the water that transverses it. Most canals are passive, simple conduits for water that are analogous to geometric rivers. Some canals actively manipulate the water flowing through them, channeling it through various devices that modify the water in some way or generate electricity. Less numerous are the canals that utilize the water in novel ways to create notable points of interest, e.g. waterfalls, deep pools, high-velocity geysers, etc. These are not to be confused with the far more common hydroliths which may perform similar feats, but are not critical low-level infrastructure.
Canals do not need to be managed, they are fully autonomous, they do however pose the risk of presenting a challenge to some travelers who wish to move freely across the globe. Luckily an animal subset of denizen is highly specialized to mitigate this aspect of the canal system. While the canals are host to a variety of civilizations, only one can claim absolute mastery, the noble yet eternally playful otter
rules the waterways of neotoy. In addition to living in the canals themselves, otters provide the essential service of ferrying other denizens across the otherwise impassable canals.