Pictures from fairyland. Images from the Panama-Pacific International Exposition which was held in San Francisco, California in 1915. Many with illuminations by Walter D’Arcy Ryan of General Electric who had previously lit up Niagara Falls.

"Night Illumination - Panama-Pacific International Exposition - San Francisco, California - 1915."
“Night Illumination – Panama-Pacific International Exposition – San Francisco, California – 1915.” 20th c. Image © Wolfsonian Library/Florida International University. Fair use license. via https://wolfsonianfiulibrary.wordpress.com/2014/04/24/the-jewel-city-by-the-golden-gate-the-1915-panama-pacific-international-exposition/?blogsub=confirmed#blog_subscription-3
"View Along Avenue of Palms." X-131.
“View Along Avenue of Palms.” X-131. Illustration from the official souvenir booklet and published by the Pacific Novelty Company, San Francisco. 1915. Colorized photograph. In the public domain. via http://digiarchive.blogspot.com/2011/07/panama-pacific-international-exposition.html
"Palace of Horticulture Illuminated." X-162.
“Palace of Horticulture Illuminated.” X-162. Illustration from the official souvenir booklet and published by the Pacific Novelty Company, San Francisco. 1915. Colorized photograph. In the public domain. via http://digiarchive.blogspot.com/2011/07/panama-pacific-international-exposition.html
"The Jewel City" by the Golden Gate: the 1915 Panama-Pacific International Exposition.
“The Jewel City” by the Golden Gate: the 1915 Panama-Pacific International Exposition. 1915. Probably a vintage postcard. Image © The Wolfsonian Library, Florida International University. Fair use license. via https://wolfsonianfiulibrary.wordpress.com/2014/04/24/the-jewel-city-by-the-golden-gate-the-1915-panama-pacific-international-exposition/
Illuminated building from the exposition.. 1915.
Illuminated building from the exposition. 1915. Lantern slide. Joseph Abel, photographer. Department of Agriculture, United States National Archives. In the public domain. via https://catalog.archives.gov/id/24720353
Illuminations, Panama-Pacific International Exposition.
Illuminations, Panama-Pacific International Exposition. 1915. Lantern slide. Joseph Abel, photographer. Department of Agriculture, United States National Archives. In the public domain. via https://catalog.archives.gov/id/24720371
Illuminated building with reflecting pool, Panama-Pacific International Exposition
Illuminated building with reflecting pool, Panama-Pacific International Exposition. 1915. Lantern slide. Joseph Abel, photographer. Department of Agriculture, United States National Archives. In the public domain. via https://catalog.archives.gov/id/24720395

Lots of wonderful lantern slides left though these are all the ones showing the illuminations. But all with the same dream-like quality. Look for one or two more posts with some of those.