<?php echo '<a href="http://google.com">'<img src="'.$path.$row_Feat['filename'].'">'</a>' ?>
Well you closed your quotes without using the . operator.
Maybe try
<?php echo "<a href='http://google.com'><img src='{$path}{$row_Feat['filename']}' /></a>" ?>
By the way just in case you didn't know
$Name="Rob";
echo "Hello my name is $Name"; will display --> Hello my name is Rob
echo 'Hello my name is $Name'; will display --> Hello my name is $Name
Single Quotes are treated as litereal in PHP, and will display exactly what is inside them and display the varible name eg $Name instead of Rob This also means Single Quotes are better for output that does not have variables in it, because it is parsed faster.
Double Quotes are better when putting variables inside strings
Also the {} operators are a way to put variables inside of strings without having to use the . operator all the time.