page_title: East Bay Walls
hierarchical_section_title: East Bay Walls
caption_attribution_description: English: One of many old stone walls found around the southern and eastern San Francisco Bay in California.
context_page_description: East Bay Walls, also known as the Berkeley Mystery Walls, is a misnomer, as there are many such crude walls throughout the hills surrounding the San Francisco Bay Area. In places, they are up to a meter high and a meter wide and are built without mortar; the walls run in sections anywhere from a few meters to over a half mile long. The rocks used to construct the walls are a variety of sizes. Some are basketball-sized rocks, while others are large sandstone boulders weighing a ton or more. Parts of the wall seem to be just piles of rocks, but in other places it appears the walls were carefully constructed. The exact age of the walls is unknown, but they have an old appearance. Many of the formations have sunk far into the earth, and are often completely overgrown with different plants.
context_section_description: East Bay Walls, also known as the Berkeley Mystery Walls, is a misnomer, as there are many such crude walls throughout the hills surrounding the San Francisco Bay Area.  In places, they are up to a meter high and a meter wide and are built without mortar; the walls run in sections anywhere from a few meters to over a half mile long. The rocks used to construct the walls are a variety of sizes.  Some are basketball-sized rocks, while others are large sandstone boulders weighing a ton or more.  Parts of the wall seem to be just piles of rocks, but in other places it appears the walls were carefully constructed.  The exact age of the walls is unknown, but they have an old appearance.  Many of the formations have sunk far into the earth, and are often completely overgrown with different plants.
caption: One of many old stone walls found around the southern and eastern San Francisco Bay in California, this one near San Jose
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