I agree the Torre de Cristal is definitely my favorite too.
I'm celebrating New Year in Madrid this year so I'm excited to see the towers in real life. Will definitely take plenty of photos and post them on here for you all!
I hope they're all lit up at night as that would look awesome. Our
apartment in Madrid is pretty central as we booked it all back in October so fingers crossed if we have a balcony, we'll be able to see
Puerta de Europa from our room!