1. It has a natural saltwater lake, with a monster.
Lake Merritt is the only natural saltwater lake within city boundaries in the entire world. It is also home to the oldest U.S. wildlife refuge, which was designated in 1870. This lake has its very own monster called the Oak-ness Monster, that has been appearing there since the 1940s. The best spot to catch a glimpse of this creature is from the docks at the Lake Chalet Restaurant.