Cloudships congregate and park over various mountains and other auspicious places. You may wish to turn the sound off.
httpsv://www.youtube.com/watch?v=jwpsTZIkEiA&NR=1
And clouds (probably a cloudship) over Mexico, Feb. 2010
httpsv://www.youtube.com/watch?v=91DngoT5Hi8
And some time-lapse photography of lenticular clouds over Santa Clarita, CA, March 9, 2010. Sorry for the underwear commercial.
httpsv://www.youtube.com/watch?v=8KlRCq5SDTE
And a ring inside a cloud, over Caracas, Jan. 10, 2010
httpsv://www.youtube.com/watch?v=ICJe1J4yk3M
And a ring over Mexico, Nov. 2009, without a cloud.
httpsv://www.youtube.com/watch?v=mvGmNIccflc