Dean Holden's side arrived in Spain on Sunday and on Monday took part in a triple session in 30-degree heat.
Fans can view the photos from day one below, as well as a video.
The Addicks take on Leyton Orient in Spain on Friday (10am BST), you can watch the game LIVE on CharltonTV. Click here to purchase your pass.
Video: Day one in Spain
Gallery: Day one in Spain