Natural seeps occur in the La Brea Tar Pits and the McKittrick Tar Pits in California, as well as in the Dead Sea.
nˈætʃɚɹəl sˈiːps əkˈɜːɹ ɪnðə lˌæ bɹˈiə tˈɑːɹ pˈɪts ænd ðə mə kˈɪtɹɪk tˈɑːɹ pˈɪts ɪn kˌælɪfˈoːɹniə, æz wˈɛl æz ɪnðə dˈɛd sˈiː.