Well here are a few people luck or unlucky who found things buried in their property.
Gravestones

Underneath her stepping stones in her backyard this woman found old headstones from the 1800’s, while she was gardening.
Old Coin

This lucky guy found an interesting old coin in his backyard while cutting grass.
A Treasure-Trove

A guy named Andreas K. from Wiener Neustadt, Austria found a treasure-trove of 650-year-old jewels while he was digging to expand a small pond in his backyard. the treasure had over 200 rings, brooches, ornate belt buckles, gold-plated silver plates and other pieces or fragments.
Precious Audio Tapes of Martin Luther King, Jr.

These precious audio tapes were found by Steven Tull, the audio tapes were of a conversation between Steven’s father and Martin Luther King, Jr when he interviewed King in 1960 for a book about the Civil Rights movement that never came to fruition.
The golf ball.

This grey colored golf ball from 1899 was found found in the Bronx, maybe this grey golf ball was white in color when it was actually in use.
A Live Korean Missile

Out of all the unexpected things in the world this couple in St. Francis, Wisconsin found a live 20-inch-long Korean missile with a 5-inch explosive head inside of their bathroom wall while they were remodeling. It was then reported that the previous owner was a man that served in both World War II and the Korean War.
Finally gold!

Finally someone found something worth while, this man from California used a metal detector in his backyard to find a 8.2 pound lump of gold in 2011. The man sold this piece of gold at an auction for $460,000 but remained anonymous so that no one would go digging around for gold on his property.
A $5 Million Figurine

This man must have done some really good deeds to find such a priceless piece of art, this random figurine of a former Russian czar was found in someone’s home that ended up being worth $5 million at an auction.
Church Bells

In Czech Republic a man found two large church bells that were about 400 years old while he was digging up dirt in his backyard to install pipes.
Cheetah

A nine-year-old boy from Hamerton, Cambridgeshire, U.K., found a cheetah in his house’s garden. The predator had actually broke free from a nearby animal sanctuary.