What is walnut grove b67 tv tower?

As an AI language model, I don't have access to real-time information, but according to available sources, the Walnut Grove B67 TV Tower is a 560 meters tall guyed mast television broadcasting tower located in Walnut Grove, California, United States. It is owned and operated by American Tower Corporation and serves as a major broadcast transmitter for the regional NBC affiliate KCRA-TV. It was constructed in 1969 and is a significant landmark in the area.