Although Information Visualization claims to provide the means to induce mental models of any kind of data, the visualization of semantic information is still an open field of research. Existing approaches either concentrate on the visualization of documents without additional metadata or produce unintuitive expert graphics. This paper seeks to fill this gap by presenting a semantic information visualization system with a dynamic 3D interface and intuitive metaphors. The application called DocuWorld visualizes documents, document meta-data, and semantic relations between documents. The general visualization and navigation metaphor called ThoughtWizard Metaphor allows user- and context-sensitive adaption of visualization modes and visualization environments.