Far beneath the roar of Route 1 in Trenton, there is another manmade highway that lies in stillness and darkness, unused and nearly forgotten for nearly 100 years. It is a section of the Delaware and Raritan Canal and in the last century it too was a great artery of commerce, dug with shovels and picks by thousands of men. Beyond this underground section, the rest of the canal is now beautiful parkland in the center of New Jersey. What started as the machine in the garden has become the garden in the machine.