What are your favorite rabbit hole sites?

Though looking adorable, this site is actually a dark rabbit-hole like puzzle game filled with disturbing imagery, jumpscares, and flashing lights. This site is not recommended for people who are epileptic, having heart problems, or easily disturbed but, I love this site. I've always loved the sorta bait and switch type horror (ex:Doki Doki Literature Club) and this one is a classic.

(WARNING: FLASHING LIGHTS AND WEIRD NOISES)

When it comes to creators websites, you would usually expect a normal looking site or some shit. But, this site by author Angus Nicneven is as creative as it is an utter rabbit hole. Featuring strange lore, glitchy imagery, and lovely art, this site holds a special place in my heart. It also makes me want to learn html and css but, I'm literally lazy.

Though not technically a rabbit hole site, I wanted to point this site out because it's not as well known but it's one of my favorites. Shout out to the screamer wiki for helping me discover this site. Created by ATOLS a japanese vocaloid producer when they were a kid but, recently revamped, this site is another bait-and-switch type site. You click on the character and pretty much beat the shit out of her before weird cubes go on the screen, but I won't spoil the rest of the scares.