America's Pyramids.

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 waste dumps (which are designed to survive the thousands of years it takes nuclear waste to become nontoxic); and the buildings on the Washington Mall, since they are modeled on durable classical architecture. Of course, Scully adds, global warming could also "put the Mall --only a few feet above sea level under water in 1,000 years."