These images are useful for finding H-alpha regions.
"The Southern H-Alpha Sky Survey Atlas is the product of a wide-angle digital imaging survey of the H-alpha emission from the warm ionized interstellar gas of our Galaxy... This atlas covers the southern hemisphere sky (declinations less than +15 degrees). The observations were taken with a robotic camera operating at Cerro Tololo Inter-American Observatory (CTIO) in Chile. A similar survey (VTSS) of the northern hemisphere sky is being carried out at the Virginia Polytechnic Institute. (The WHAM survey also covers the northern hemisphere, but at higher sensitivity and lower angular resolution.) At low galactic latitudes, these images show the structure of the diffuse, warm, ionized component of the interstellar medium. It is hoped that their study will lead to a better understanding of the dynamics and evolutionary history of the interstellar gas."
http://amundsen.swarthmore.edu/SHASSA/#Images
I like this all sky map with Auriga on the LHS, Scorpio in the middle and Orion on the RHS.
http://www.astro.princeton.edu/~dfink/halpha/jpegs/comp_big.jpg
