To illustrate this point, consider that Microsoft, started in 1975, reached a peak equity market valuation of over $500 billion in 2000, yet is currently worth just over $200 billion (September 2010).
Madrid is a remarkable capital city with numerous interesting attractions that reveal an important history. The must sees of the city include Old Madrid, the Museo del Prado, the Palacio Real (Royal Palace), its gardens, Retiro Park, and the city's many fine and famous plazas.
Travel time is an important point to know with the driving distance. Hence you might also want to know the Travel Time from Salamanca to Madrid Barajas Airport. This will help you estimate how much time you will spend travelling for the distance from Salamanca to Madrid-Barajas Airport.