Hilton HHonors members can earn 1,500 bonus points per night when staying at a Curio Collection hotel.
The offer runs until July 31. Members must register at hhonors.com/curiobonus prior to check-out to qualify.
Registered members will receive 1,500 bonus points per night up to a maximum of four nights, or 6,000 bonus points.
Members completing additional stays within the promotional period will continue to earn standard base points. Bonus points earned on base points do not count toward tier qualification.
Hilton launched its four and five-star Curio brand in the US last year (see news, June 2014).
There are currently six Curio properties, all in the US, with a further five scheduled to open this year, including a hotel in Hamburg, which is due to open on May 31 (see news, March 3).