Quote"(T)he Garny Gorge is made out of a high number of basalt columns. It?s an absolute must-see if you find yourself in Armenia."
Incredible natural structures.
http://www.odditycentral.com/pics/the-garni-gorge.html
Incredible man-made structure:
http://www.odditycentral.com/pics/worlds-largest-swimming-pool.html
More like a lake, but hey it's maintained like a pool so puhtaytoe puhtatoe...
Then again, there's ^ coolness ^ ... and then there's stupidity:
http://www.odditycentral.com/pics/taking-a-swim-in-the-devils-pool.html
http://www.blog.joelx.com/devils-swimming-pool-victoria-falls-zimbabwe/868/ (source, apparently -- has some comments)
(Google Maps (http://maps.google.com/maps?f=q&hl=en&geocode=&q=Victoria+Falls,+Zimbabwe&ie=UTF8&ll=-17.924598,25.848083&spn=0.014455,0.019312&t=h&z=16&msa=0&msid=107527528240052043257.00043564469016393adc3))