...Videos...

In these 4 videos are making a "sightseeing" is documentary as we detail each place and a bit of history on the other encontamos city.And a bit of history and documentaries that are on the net regarding this city.
Underground cities.
https://www.youtube.com/watch?feature=player_embedded&v=NPlK4PLruoM
  Medieval London.
https://www.youtube.com/watch?feature=player_embedded&v=p5uBhnMhi5Y
  Route E1.
https://www.youtube.com/watch?feature=player_embedded&v=BlRI670sjQk
Tour 2.
https://www.youtube.com/watch?feature=player_embedded&v=kI87yGamFVQ
  Tour 3.
https://www.youtube.com/watch?feature=player_embedded&v=Kj5hq8731_A
Tour 4.
https://www.youtube.com/watch?feature=player_embedded&v=4D_PQqXELmU