What are the initials of a passage between the atlantic and the pacific shot by french and british explorers?

"N.P." would be the initials of a passage between the Atlantic and Pacific sought by many different explorers over the years, including French and British. They stand for "Northwest Passage," the elusive route between the great oceans that served as a tremendous inspiration for land- and sea-borne explorations of northern North America.

Idon’t know who knows but i know who does not know me

I'm pretty sure that's called a volcano