Forest of Remembrance

The Forest of Remembrance, formerly known as the Forest of the Departed, is a memorial garden located in the park of Parque del Buen Retiro in Madrid, Spain that commemorates the 191 civilian victims of the 2004 Madrid train bombings on 11 March 2004 and the special forces agent who died when the seven suicide bombers subsequently killed themselves on March 11, 2004, while under siege by security forces in their apartment block.

The new name, Bosque del Recuerdo, was chosen after the survivors and the victims' families argued that those killed are forever present and have never departed from their hearts.

Source: Wikipedia