Carnegie Museum of Natural History

The jewel (quite literally) for me of the many Pittsburgh museums is the Carnegie Museum of Natural History. This is a world class overview of five billion years of Earth history. The latest blockbusters are the "Dinosaurs in Their World" exhibit opening in November (top) and the sparkling Hillman Hall of Minerals and Gems (middle), which has just opened this year and includes treasures such as these calcite crystals (bottom).