Saturn

Historical marker location:

310-314 North Cayuga Street, Ithaca, New York

( Marker is on Cayuga Street north of Buffalo Street, on the left when traveling north.)

Marker installed: 1997

Sagan Planet Walk.

The New York City subway system, which opened in 1904, was the first rapid transit system in the world. The original line ran from City Hall to 145th Street in Harlem.