Question

is sentence punctuated correctly?Over the summer, many people plan to travel to exotic places, and play at the beach.

Answer 1

Well, no. But the big problem here is the atrocious structure. Do the people plan and play or do the plan to travel and (to) play? In any even, an unpaired comma should never come between the subject and the verb (predicate). People is the subject. As written plan is one of co-joined verbs. So that comma does not belong. However probably what was meant was:

Over the summer, many people plan to travel to exotic places and to play at the beach.

(which also does not need the extra comma).