Q. Which two countries are connected by the "Channel Tunnel"?
Answer: United Kingdom and France
Notes: The Channel Tunnel, also known as the Chunnel, is an underwater railway tunnel that connects both the United Kingdom and France, located beneath the English Channel at the Strait of Dover. It is the only fixed link between the island of Great Britain and the European mainland. This 50.45 kilometers long tunnel, opened in 1994, has the longest underwater section of any tunnel in the world.