Question

lead to a third cache. the final cache has a special reward inside.
puzzle caches: these can be the hardest types of caches to find. thats because the location of the hidden container isnt provided. players need to solve a puzzle first to learn where the cache is.
different - colored symbols on the map show where different kinds of caches can be found.
according to the map, what kind of cache is on elm street?

Explanation:

The map shows different - colored symbols for cache types. The symbol on Elm Street is the blue one which is labeled as Puzzle Cache in the legend.

Answer:

Puzzle Cache