It's easy to spend a lot of time looking through the Library of Congress Flickr photostream. That's where I found my Rosie the Riveter pictures last week. Well, I couldn't help myself when I found their travel set with over 1,000 photochrom images. "Published primarily from the 1890s to 1910s, these prints were created by the Photoglob Company in Zürich, Switzerland, and the Detroit Publishing Company in Michigan. The richly colored images look like photographs but are actually ink-based photolithographs, usually 6.5 x 9 inches." The locations for three of my favorites here are Blue grotto, Capri Island, Italy, then Kongen og Dronningen, Bispen in Norway, and the pier and shore in Blankenberghe, Belgium. If you're a history of photography buff like me then you will go nuts over this collection on Flickr!