Example of how to use JavaScript and a form to send a request using POST, rather than anchor tags and GET requests.

remove.php

<?php foreach: ($parks as $parkInfo): ?>
    <!-- ... -->

    <td>
        <!-- This is the button the user will click to remove an item -->
        <button class="btn btn-danger btn-xs btn-delete" data-id="<?= $parkInfo['id']; ?>" data-name="<?= $parkInfo['name']; ?>">
            Delete
        </button>
    </td>
    
    <!-- ... -->
<?php endforeach; ?>

<!-- This is a hidden form where we will feed the data for our request -->
<!-- Our JavaScript will pull out the park id, put it into the hidden field, and then submit this form -->
<form method="post" id="delete-form">
    <input type="hidden" name="id" id="delete-id">
</form>

<script>
    (function() {
        "use strict";
        
        // Grab all the remove buttons and attached a click event listener to them
        $(".btn-delete").click(function() {
            // Pull out the id and name of the item we want to remove
            var parkId   = $(this).data("id");
            var parkName = $(this).data("name");
            
            // Make sure the user actually wanted to delete that park
            if (confirm("Are you sure you want to delete " + parkName + "?")) {
                // Put that ID into our hidden form field
                $("#delete-id").val(parkId);
                
                // Submit the form
                $("#delete-form").submit();
            }
        });
    })();
</script>