Rare Boeing 747 in-flight wing tip vortices, rainbow contrail, halo effect at 35,000FT

I have never seen an airplanes wingtip vortices or wake in-flight. It was a clear day with very cold temperature and a fabulous sight to see the rainbow colored contrails off the 747 that was flying 1000 ft below us at 34,000 Ft. Amazing Halo Effect and perfect sunshine on the airplane. However, the most unique part was the wing tip vortices that was clearly visible in cruise flight as well.