The grammatical mistakes found in the text consist of the incorrect use of the articles "a" and "an", which means we need to correct them by changing the articles.
The indefinite articles "a" and "an" are used before singular nouns. The article "a" must be used before nouns that begin with a consonant sound, whereas "an" must come before those that begin with a vowel sound.
The grammatical mistakes in the text consist of using one article when the other should be employed. Let's correct them below:
... an treasure hunt --> a treasure hunt
... an handheld GPS --> a handheld GPS
... a adventure-loving nature --> an adventure-loving nature
Learn more about indefinite articles here:
https://brainly.com/question/19174890
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