Amazing House of the Spikes (Casa de les punxes)

Also known as Casa Terrades for the family that owned the house and commissioned Puig i Cadafalch to build it, this extraordinary cluster of six conical towers ending in impossibly sharp needles is another of Puig i Cadafalch's northern European inspirations, this one rooted in the Gothic architecture of Nordic countries. One of the few freestanding Eixample buildings, visible from 360 degrees, this ersatz-Bavarian or Danish castle in downtown Barcelona is composed entirely of private apartments. [Source]