Tendril is a web crawler that creates dynamic 3D typographic structures from the content of web sites. Branches are formed from the text of a web page, each link on the page begins another branch for the linked page. Over time, the result is an enormous branching structure, built purely out of the text that is contained in a set of connected web pages, and guided by the hand of the user as they choose the direction of links that are followed. It is part of a series of research in information visualization that seeks to bring form and structure to very large sets of raw data that are continually undergoing change.