The Knox House Museum is a historic home located in El Cajon, California that serves as a museum showcasing the history of the region. The house was built in the 1870s and has been preserved as a tribute to the early pioneers of the area.

Allen Airways Flying Museum contains over 10,000 items, including aviation and aviation movie posters, head gear, propellers, collections pertaining to historic individuals, aviation art, airplanes, and automobilia.

Grossmont High School Museum operates solely on donations, which are used to create the Museum displays, to preserve our memorabilia, and to celebrate Grossmont's history.

El Cajon is a city located in San Diego County, California, about 17 miles east of downtown San Diego. The city is known for its scenic views, outdoor recreation, and diverse population. El Cajon's 2019 population was at 102,708.

The San Diego Air and Space Museum is a popular museum located in El Cajon, California. The museum showcases the history of aviation and space exploration through a variety of exhibits and interactive displays.

The Olaf Wieghorst Museum is a small museum located in El Cajon, California, dedicated to the life and work of Olaf Wieghorst, a renowned Western artist. The museum is housed in a historic building that was once the artist's home and studio.