In Barcelona, Gaudi rules the skyline. Arguably, he is the most unique architect of an age. Being bold led to greatness. Eight of his sites are deemed worthy to bear the name UNESCO World Heritage. These buildings will never be copied:

Sagrada Familia

Casa Vicens

Güell Pavilions.

Palau Güell

Park Güell

Casa Mila

Casa Batllo.

Despite the all present buildings, one of my favorite works were his street lamps. Made for gas lighting, these were one of his first commissions. The city had planned to put them up all over, but only 6 were initially constructed. And we are glad for it.