[TXnMA]

“...Oregon Vortex...”

Distorted and off-angle walls, floors -- and perspective effects... Purpose-built hoax site. No mystery there at all.

[TXnMA]

"Or a person’s height can change by changing their position by a couple of feet."

Here -- I just created a simple example:

(The "person figures" are identical in size...)

[ETL]

Re: "Oregon Vortex"

Distorted and off-angle walls, floors -- and perspective effects... Purpose-built hoax site. No mystery there at all.

"..."So," you say, "surely there is something more to such a long-standing attraction then mere illusion?" If the terrain within the 165-foot circular area possesses paranormal phenomena, they weren't apparent last September (1997) when three members of Oregonians for Science and Reason (O4SR), Ted Clay, a skeptic from Ashland, and Josh Reese and myself, both from Salem, visited the site. ..."

Photos and explanations at the link:
http://www.o4sr.org/investigations/oregon_vortex.html