\documentclass[12pt]{article}
\usepackage{graphicx}
\usepackage[font=Large]{caption}
\begin{document}
\LARGE
\listoffigures
\vspace{36pt}
The list of figures is automatically built by including the line
\texttt{\textbackslash listoffigures} after\\ \texttt{\textbackslash
begin\{document\}}
\begin{figure}[htbp]
  \centering
  \includegraphics[width=0.75\textwidth]{aulogo.pdf}
  \caption[Short Description]{\large A really really really really really really long caption.}
  \label{fig:aulogo}
\end{figure}

\end{document}