The new aerial cable is among the longest in the world. You can board in the neighboring towns of Mesa de los Santos or Panachi across the national park (http://www.parquenacional...), it covers a fantastic view of a deep canyon (http://colombiareports.co...).
On the road to Bogota are some excellent spots worth checking out, like the Chicamocha Canyon, the towns of San Gil, Socorro, Vélez and Barichara, among others.
Girón is a small and pretty colonial style town just about 10 km outside Bucaramanga.