La Brea Tar Pits
Preserved for an aeon or so, the Pits' amazing Ice Age fossils are tagged in various excavation sites around the park. Work is generally slow, however, as the ground here is constantly evolving; around the park and out on Wilshire Boulevard you can still see black, sticky asphalt oozing up from cracks in the road and sidewalk.
One of the biggest archeological discoveries was made here in 2009, when amidst construction of a new parking lot, a treasure trove of fossils (including a wooly mammoth skeleton) was unearthed, catalogued and brought into the on-site Page Museum for study. Beyond the enormous front doors with their bronze bas reliefs, this museum takes you through both the history of Los Angeles and history itself, giving you a glimpse of a paleontological laboratory at work and ending out back in a glass-roofed forest of towering palms. Open every day, except Independence Day, Thanksgiving, Christmas and New Year's Day.