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The Chandra X-ray Observatory is providing fascinating new views of massivestar-forming regions, revealing all stages in the life cycles of massive starsand their effects on their surroundings. I present a Chandra tour of some ofthe most famous of these regions: M17, NGC 3576, W3, Tr14 in Carina, and 30Doradus. Chandra highlights the physical processes that characterize the livesof these clusters, from the ionizing sources of ultracompact HII regions (W3)to superbubbles so large that they shape our views of galaxies (30 Dor). X-rayobservations usually reveal hundreds of pre-main sequence (lower-mass) starsaccompanying the OB stars that power these great HII region complexes, althoughin one case (W3 North) this population is mysteriously absent. The most massivestars themselves are often anomalously hard X-ray emitters; this may be a newindicator of close binarity. These complexes are sometimes suffused by softdiffuse X-rays (M17, NGC 3576), signatures of multi-million-degree plasmascreated by fast O-star winds. In older regions we see the X-ray remains of thedeaths of massive stars that stayed close to their birthplaces (Tr14, 30 Dor),exploding as cavity supernovae within the superbubbles that these clusterscreated.Comment: 13 pages, 11 bitmapped figures; contributed paper to appear in the  proceedings of the STScI May Symposium, "Massive Stars: From Pop III and GRBs  to the Milky Way," ed. M. Livi

An x-ray tour of massive-star-forming regions with Chandra