West Equator
The west equator lies to the left of the North Pole and right of the South Pole. It has a hot climate suitable for only some plants.
The equatorial line itself is marked by a pole extending a short distance above and below ground. The Sunset achievement will be granted the first time one of your Blockheads reaches this pole.
When in the vicinity of the west equator, the stars move downward.
<spoiler>The Sunset Skirt Of Happiness can be found at the top of the pole.</spoiler>