One of the most unusual and educational places that I have had the pleasure to visit has been the LaBrea Tar Pits. Located in Hancock Park in Los Angeles, CA, it is surrounded by the typically cosmopolitan city, but these excavations and discoveries have been anything but typical.
To date, there have been over 100 pits located in a 23 acre area of the city. There is only one pit that is still being worked at present. That is Pit 91. It is worked for only two months each summer. Fossils are usually presented, after being cleaned, identified, and catalogued, to the museum attached to the LaBrea Tar Pits. You can actually watch the work going on if you should visit during this time, but you can always see the results on display in the museum.
These fossils go back thousands of years, but because the tar pits are still active, new fossils are still being created, which will be probably be uncovered at some future time. Don't miss the chance to visit this fascinating excavation, but be prepared for the strong smells that pervade the area.