Buenos Aires sports a pretty standard Hilton, large, central, business-oriented, confident and reassuringly expensive; and a quirky Curio Collection boutique style place in delightful but off-centre and charmingly delapidated San Telmo.

There's a lot written here about both hotels.

Hilton Buenos Aires {ARG}

Anselmo Buenos Aires, Curio Collection by Hilton {ARG}

LINKS for Hilton Honors Hotels in Argentina {ARG}