On Brad Meltzer's Decoded - the Devil's Graveyard, he briefly mentioned this theory. I thought what a great blog article! After doing some not-so-informative research, I've found there is hardly anything published on this subject so I've got my work cut out of me.
For those who are not a paranormal nerd like myself, I will first explain what cryptids, vortexes, and ley lines are so you know what the hell I'm talking about. A cryptid is a creature that is thought to be seen but it has not been proven it exists such as Bigfoot, Chupacabra, and the Loch Ness Monster.
A vortex, in this context, is a spinning spiral of energy located at various spots around the world. Ley lines are associated with vortexes. These lines are a crack in the earth's tetonic plates which forms a straight line. Magnetic energy is thought to escape from these lines. I believe a vortex is where ley lines intersect and spiral into a vortex.
The obvious answer to locating a hotbed for cryptids would be to map the sightings to see if they correlate with ley lines and vortexes.
Next up is Chupacabra with sightings in Puerto Rico, Mexico, and Texas marked in green. The Loch Ness Monster found in Scotland in blue. Orang Pendek in Sumatra in orange.
The winner would have to be Orang Pendek right in the middle of 3 crossing lines, with Nessie in a close second where 2 lines intersect. The rest of the cryptids do seem to hang out near ley lines but it's hard to say this is an actual fact.
It is thought animals, such as pigeons and whales, use ley lines for migration and navigation. Is this proof these elusive creatures also use the lines as a compass?
Why would cryptids be attracted to these magnetic hotspots? Do they want to be close to their "highways?" Ancient people such as the Maya Indians constructed their trade routes along these lines.
Another theory is energy vortexes are a portal to another dimension. This would explain why Bigfoot is so hard to find. He can just cross over into another world to escape prying eyes.
Be sure and read Part Two in this series, Ley Lines - A Hotbed for Spirits and Part Three, Ley Lines - A Hotbed for UFOs.