Waterfall

Waterfall is the second area in Undertale that the protagonist journeys through, coming immediately after Snowdin. It is a dark, wet, and cavernous region and houses residence for Undyne, Napstablook, Napstablook's cousin (Mad Dummy), and Napstablook's other cousin, Mettaton.

Description
Largely a dimly lit area, the caverns and open regions of Waterfall house many fields of Echo Flowers, living areas, and also the Garbage Dump. It is characterized by its blue, black, and purple colors, as well as being often quite rainy. Despite this, the Echo flowers and the water surrounding them displays a unique bright teal color, which provides light in the dark region.

Enemies

 * Aaron
 * Woshua
 * Moldsmal
 * Moldbygg
 * Shyren
 * Temmie
 * Mad Dummy

Features

 * Undyne's home
 * Napstablook's home
 * Napstablook's cousin's home
 * The Snail Farm
 * Snail Racing Game/Thundersnail
 * Echo Flower Fields
 * Temmie Village
 * Onion-san
 * Ferry Monster
 * The bird that carries you over a disproportionately small gap
 * Piano Puzzle and Artifact Room
 * Gaster Room (Fun values only)

Trivia

 * When you inspect the southern wall down and to the right of Sans' expensive telescope or directly below the nice cream corridor you get the text "(The Gems on the southern wall shine in a spectacular pattern.) (It's a nice thing you can see the southern wall from this angle.)