In Hunt County, Texas, a construction worker was sprucing up a recently purchased house when he noticed the sidewalk near the front yard was made of upside-down gravestones. Thinking he’d unearthed either a grave or a cemetery, the worker reported his finding to authorities.
They traced the stones, which mostly bore death dates of 1974, to graves in a Fort Worth cemetery, and it turns out they were rejected by families of the deceased for misspellings or other areas. So, basically, they were recycled for practical use.