I was reading a sentence in Deutsch
Ich mag es, grossartige Kunstwerke zu bewundern.
I can translate this roughly to "I like to admire great works of art."
Now, I know that there is an infinitive clause present with the "zu bewundern", but I can't seem to find a reasonable reason for why we need the "es" after "Ich mag".
I would have constructed the sentence as
Ich mag, grossartige Kunstwerke zu bewundern.
What is the reason for es?