In the process of landscape visualization by using computer graphics (CG), the formats of landscape description are different among the systems but there are many similarities in the contents of description of data. The purpose of this study is to show the availability of XML (Extensible Markup Language) for landscape description and visualization. In this study, we discussed the landscape elements for the description of landscape and defined the format of XML based on the description. The defined XML was applied to the simulation of a landscape by two visualization systems, i.e. AMAP (Atelier de Modelisation de Architecture de Plants) and VRML (Virtual Reality Modeling Language). The availability of the application of XML for landscape visualization was practically confirmed. We found there remained some problems on the present XML system and discussed the solution for the problems. We also discussed about application of standardized XML format for landscape visualization in geographic information systems.