Change default home background

Hi! I just recently downloaded Hestia as my theme and am wondering how to get rid of the city background that currently exists in the first/body block and contact block? I’ve looked under Customize-Background but there is no image uploaded, and it’s not uploaded into the “home” page’s settings.

The city background seems to have been a default with the theme.

The page I need help with: [log in to see the link]