Beer has been brewed for more than 13,000 years but in Iowa 19th century makers wanted to ensure it was made and stored at the right temperature, so came up with a unique solution

A team from an investment firm tasked with renovating an old brewery were delighted to find a cave hidden for 100 years which was an essential part of brewing in the 19th century. The plan was to turn the building into residential units, but the new owners had also been tipped off that there might be something more to the site.