ChaChaCha uses a waffle pan to sear on the coin image, which displays the words “The Bank of Korea 1998” on one side and the Dabotap Buddhist temple in Gyeongju, South Korea, on the other.

When Taylor Kim moved cross-country from New York to Dublin in 2012, what she missed most following the move wasn’t the bustling nightlife, famous museums or even the parks — it was the infinite ...