  A simple modification of the Monte-Carlo algortihm is proposed to explore the
topography and the scaling of the energy landscape. We apply this idea to a
simple hard-core fluid. The results for different packing fractions show a
power law scaling of the landscape boundary, with a characteristic scale that
separates the values of the scaling exponents. Finally, it is shown how the
topology determines the freezing point of the system due to the increasing
importance and complexity of the boundary.
