x marks the spot

x marks the spot
Meaning: when someone finds something looking for, this is the exact spot, mark something with X on target.
Example 1: X marks the spot, so let's go and dig up treasure.
Example 2: I pointed to the location on the map and told the recruits “x marks the spot”.
Example 3: We looked at the Google map and saw that X marked the spot where it was the cloud brust and killed many people.

Origin: What is said upon finding your target has been marked out derived from an X on pirate treasure maps. The phrase was put into common usage by the British army, who performed executions by marking a piece of paper with a black x and positioning it on the heart of someone sentenced to death.