*South San Francisco
It's hard to miss the sixty foot concrete letters which spell out the slogan of South San Francisco, situated on Sign Hill at the foot of San Bruno Mountain just south of San Francisco. Constructed in the 1920's at the prompting of the Chamber of Commerce to promote the city, it has become an icon viewed by millions over the years, as it fills the windshields of northbound travelers on Highway 101 into San Francisco. It was recently added to the National Registry of Historic Places.
One day when we were ten years old, my twin brother and I set out to hike up to the sign and cover up one of the letters. After a rigorous climb, the ground turned out to be as hard as rock and completely devoid of anything capable of concealing even a square inch of the letter "I".