Europe and later Africa exported, unintentionally, more than a dozen diseases that killed large numbers of American natives. Some, like measles and chickenpox, were childhood diseases that usually did not cause many deaths in the Old World but killed millions of American natives.
Mission Bay (San Diego) Mission Bay is a saltwater bay or lagoon located south of the Pacific Beach community of San Diego, California. The bay is part of the recreational Mission Bay Park, the largest man-made aquatic park in the country, consisting of 4,235 acres (17.14 km2), approximately 46% land and 54% water. The combined area makes Mission Bay Park the ninth largest municipally-owned park in the United States.
Mission Beach. Spanning just over a mile in length, Mission Beach is at the center of the Golden Strand, between South Mission Beach and Pacific Beach. One of the most popular beach areas in the City of San Diego, Mission Beach draws large crowds in the summer to its oceanfront and adjacent Belmont Park. Mission Beach is one of nine beaches that has permanent lifeguard stations patrolled by San Diego Lifeguards.