\usepackage{afterpage}

\afterpage{
  \begin{figure}
    \begin{center}
      \includegraphics[scale=0.75]{images/the_cited.png}
        \caption[The LOF caption]{Lorem ipsum. \tiny{Example\footnotemark}}
    \label{fig:cited_img}
    \end{center}
  \end{figure}
  \footnotetext{Source: \url{http://www.example.com/the_image.png}
}