South America

Argentina:
Faena hotel ( Buenos Aires)

Bolivia:

El Poncho Ecocenter (near Cochabamba)
Floating Islands in a Lake (Lake Titicaca)
 
Brazil:
Colourful Painted Slums (Rio de Janeiro)
Abandoned Estate transformed by artists (Sao Paulo)

Chile:
Hotel La Montaña Mágica (Huilo)
Hotel Valdivia (Santiago)
EcoCamp Patagonia (Torres del Paine National Park)

Colombia:
The Haunted Hotel at the Tequendama Falls (San Antonio del Tequendama)
Casa Terracota (Villa de Leyva)

Grenada:
Underwater Sculpture Park (Moliniere)

Peru:
Floating Islands in a Lake (Lake Titicaca)






For countries like Mexico etc look for the
category Central America in North America.