Wadi comes with 4 different scenarios. Extra scenarios can be found here. Hopefully they give you new ideas. Enjoy!
You can download all the scenarios below in one PDF-file or one at a time:
Wadi al Mabraq (Saudi Arabia) - added in March 2009
Wadi al Masilah (Yemen) - added in March 2009
Wadi Thamit (Libya) - added in February 2009
Wadi Jedi (Algeria) - added in June 2008
Wadi Al Mujib (Jordan) - added in June 2008
Wadi O'Clock (Phant-Asia) - added in May 2008
Wadi Bahta (Chad) - added in May 2008
Wadi El Kebir or Guad al Quivir (Spain)
Wadi Quragyah (Egypt)
Wadi Tafna (Algeria)
Wadi al Malik (Sudan)
The same scenario, but then a little bit easier.