These pictures inspire me to make additions and changes to my layout, please post yours too!
The Erie Railroad tunnelled through Bergen Hill to its terminal on the North River where the Hudson Tubes station was built. While the Pennsylvania cut was basically open and shallow, and the Lackawanna cut was covered and deep, the Erie cut was a mixture. In 2003 various plans were being argued for the future of the cut.
The old Harlem Cut on Park Avenue at 125th Street in New York City and its old station in the cut 1875-1885.