Igreja do Carmo, Porto

This 18th-century Baroque church is a visual feast with its gilt carvings and Portuguese Rococo touches.

Igreja das Carmelitas, the 1-meter house, Igreja do Carmo

Igreja do Carmo and its neighbor, Igreja das Carmelitas, are separated by what could be the world’s thinnest house, a 1-meter wide sliver. A Portugese law used to prohibit churches from sharing walls, so voilà, a house was built.

Rua da Carmo, Porto