Gensokyo is a hidden community which is usually sealed off from the rest of the world. It is home to several youkai and other characters which appear in chat. These characters are most closely affiliated with the Langister family and Gensokyo was at one time saved by Solarchos.
Areas of Interest
Scarlet Devil Mansion: The home of Remilia and Flandre Scarlet, and residence of Sakuya Izayoi. Meiling Hong is supposed to be the gatekeeper, but her narcolepsy causes no end of trouble.
Human Village: From time to time, Humans end up drifting into Gensokyo through the Great Hakurei Barrier. As many of them often lack the means to defend themselves against the various youkai and other monsters, they tend to congregate here.
Hakurei Shrine: Reimu Hakurei resides here, and she maintains the Great Hakurei Barrier.... or at least she's supposed to, but a combination of general laziness and dwindling faith have kinda made that job more of a chore.
Bamboo Forest of the Lost: A gigantic forest composed of bamboo, as the name would indicate. Fujiwara no Mokou can often be found here.
Eientei: The residence of Eirin Yagokoro and Reisen Udongein Inaba, Eirin uses her medical knowledge to help treat people, with Reisen as her assistant. Beware of a certain rabbit known as Tewi Inaba, as she is a notorious trickster.
Tengoku (Heaven): Normally virtuous souls ascend to this realm. However, Tenshi Hinanawi was granted Celestial Status alongside her parents, and proves to be an infamous problem, even among the Celestials.
Jigoku (Hell) Whereas virtuous souls go to Heaven, sinful souls come here to Hell. It's been implied there is more than one Hell, and that the current Hell was established due to overpopulation, with the Former Hell being the dwelling of many Oni.
Hakugyokorou: Yuyuko's Netherworld. Often enough, only those able to actually die are able to come here, which prevents truly immortal beings like Mokou from being able to visit.
Higan: Shikieki Yamaxanadu holds her court here, judging souls. She is one of the ten yama that judge whether a soul goes to Heaven or Hell.