An entry that is long overdue. Never would have believed that a simple doorway could spell your doom, but I have seen several tourists go through ordinary-looking doors and simply disappear into thin air, never to be seen again. This phenomenon is unexplained. Devours door-to-door salesmen? The lunar cycle seems to have something to do with it. "Gateway Moon." Avoid this door on Main Street (Number 13)!

Any door with the number thirteen appears to be a portal to a different plane of existence. Or instant death. Haven't had the nerve to test it.

Cursed Doors! One briefly appeared in the basement. I lost my calculator inside. KNOCK! KNOCK! WHO'S THERE? THE FORCES OF EVIL! Dark energy readings 40% higher this year! Cursed doors are a common component of life in in Gravity Falls. The locals know which doors to avoid. Visitors are left to fend for themselves. The tourist bureau really should publish some sort of pamphlet.

NOTE TO SELF: write letter to tourist bureau.