- Underground-Like Locations on the surface
 = Ruins -> Abandoned City, slightly maze. only location "underground"
 = Snowdin -> Right outside of Ruins and Old CORE. Cold temperatures + snow from duplicate CORE being deactivated and not heating the area. Settlements there however, including Snowdin Town.
 = Waterfall -> Off to the northeast of Snowdin - Closer to the CORE, causing snow to melt. Humidity generates as well, causing the marshy like climate and geography. Contains old mining caverns.