GRAY whales engage in the longest migration of any mammal in the world , swimming 6,000 miles from feeding grounds in the icy waters north of Alaska to warm breeding lagoons off Baja California , Mexico , and 6,000 back .
Baja California /location/administrative_division/country Mexico
Mexico /location/location/contains Baja California
Mexico /location/country/administrative_divisions Baja California
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Baja California
LOCATION
Mexico
LOCATION
/location/administrative_division/country
Mexico
LOCATION
Baja California
LOCATION
/location/location/contains
Mexico
LOCATION
Baja California
LOCATION
/location/country/administrative_divisions