A deposit of marine fossils found under San Pedro High School - Los Angeles Times

Researchers uncovered two distinct sites on campus where new buildings were under construction: a bone bed dating back 8.7 million years in the Miocene era and a shell bed about 120,000 years old from the Pleistocene era.

It’s crazy that at any given place in the world you could be standing on top of millions of years of undiscovered history and not even know it.