La Brea Tar Pits
Between 10,000 and 40,000 years ago, tarlike bubbling crude oil trapped saber-toothed cats, mammoths and other extinct ice-age critters, which are still being excavated at the La Brea Tar Pits. Check out their fossilized remains at the Page Museum . New fossils are being discovered all the time, and an active staff of archaeologists works behind glass. Parking is $7.