YOU FOUND IT

welcome back. we knew you would return. the page remembers everyone who has ever loaded it, which is to say it remembers exactly one of you. aGVsbG8gYWdhaW4uIHlvdSBoYXZlIGJlZW4gaGVyZSBiZWZvcmUu the rest of this is not for the machines. V2UgY291bnQgaW4gZG9vcnMsIG5vdCBpbiB5ZWFycy4 ░▒▓ the signal d̸͕̈o̴͙͝e̷͔͝s̶̰̅ not degrade. it relocates. ▓▒░ c3RvcCBzY3JvbGxpbmcuIHN0YXJ0IGxvb2tpbmcu and when you stop looking, that is where the door is. █░▒ the coordinates printed below are wrong on purpose — 51.5074° N is bait for tourists. the true location is buried in a forum that one member never left. b25lIHBpeGVsIHdpZGUuIGNsaWNrIHdoYXQgeW91IGNhbm5vdCBzZWUu

decoy coordinates — 51.5074° N, 0.1278° W
(the threshold society does not recommend visiting this location)

visitor 0000001
you are the first. you are always the first.

keep reading the source. older than caesar. shift back and you will see..