An American couple in their 40s have found a stash of rare gold coins worth $10 million on their property in Northern California. The hoard was found inside a rusty metal can whilst the couple were out walking their dog.

The coins are dated between 1847 and 1894, are uncirculated and are in excellent condition. Some of the coins are so rare that experts believe they could fetch over $1 million each.

The discovery is being seen as one off the largest finds of treasure in U.S. history. One of the previous largest finds was in 1985 when construction workers found $1 million of gold in Jackson Tennessee.

The couple, who wish to remain anonymous, are going to keep a few coins for keepsakes, but plan to sell the majority of coins on Amazon.