Free Admission Wednesday at La Brea Tar Pitsm - see INFO below. Located in the heart of L.A., La Brea Tar Pits are one of the world's most famous fossil localities, where more than 100 excavations have been made! It's a fascinating piece of land. Over time, this area has been ancient forest and savannah, ranch land and oilfield, Mexican land grant, and Los Angeles County Park. More Info below.