One of four primary homeworlds of the Hynerian Empire, and seat of power for its Dominar, who rules over 600 billion subjects. It is organized into "provinces", hinting at a strong Chinese influence.
Given that all Hynerians seen in the series, such as Rygel XVI and Orrhn Pak, are froglike, it can be concluded that Hyneria is a largly aquatic world, like mentioned in the second episode, with multitudes of island chains and clusters being likely, and perhaps a continent or two of mostly swamps and marsh, lined with rivers and stretched out lakes.
Artificial islands of stilted cities and reefs may also be possible. Depending on the weather and climate, cities may be heavily fortified and shaped to resist hurricanes (much like the Kamino cities of star wars), or be of other, more basic designs.