Delaware
Delaware is supposedly a state. Delaware does not in fact exist, it is a distortion of space-time that only appears to exist. Anyone you've met who thinks they have been to Delaware, or believes they have lived in Delaware have had fake memories implanted by the U.S. government. This is because they cannot explain it, and it would cause a mass panic if the public knew the truth. If you attempt to drive into Delaware you will wake up in Russia, naked, and with no memories. (This is how Russia gets new citizens).