America's Pyramids.

• Position: Objects that may survive until the next millennium includes nuclear waste

Although the new millennium has just begun, at least one observer is already looking ahead to the next. Which of today's creations, wonders Yale art historian Vincent Scully, will still exist a thousand years from now? Scully's guesses: New York's Fresh Kills garbage landfill, which is 25 times bigger than the Great Pyramid in Egypt (and nothing anyone will want to mess with); built-to-last super-max prisons; the interstate highway system (or at least a few surviving remnants); underground nuclear...