Houses on one side of the street are in Canada (Quebec) and on the other side the houses are in the U.S. (Vermont). People used to cross the border regularly in their day-to-day lives. However, recently the U.S. government has heightened border security, set up border patrol agents, and now a passport is required to cross. The building that houses the town library and the opera, however, is still in both countries.
You can learn more about this unusual neighborhood in this NPR story or by watching this video.
19 Astonishing Facts