In 1990, while sojourning in New York City, Kippenberger started a body of work collectively known as the "Latex" or "Rubber" paintings. Also in the 1990s, influenced by the Lost Art Movement, Kippenberger had the idea of an underground network encircling the whole world. Located on the Greek island of Syros and in Dawson City, Canada, false subway entrances are part of the "Metro-Net World Connection" series (1993–7) Kippenberger built as private commissions; a sizable length of subway grating, complete with the sounds of trains and gusts of wind, was exhibited posthumously at the Venice Biennale.