“Riverdance” celebrates a decade of sold-out performances at Wolf Trap with six concerts of thunderous dancing, precision tapping and exotic presentation of ancient Celtic myths to the intoxicating beat of ethnic rhythms adapted by composer Bill Whelan.

After attending concerts this week by “Riverdance” troupes touring Ireland and England, Julian Erskine, senior executive producer, heads to Wolf Trap for an engagement he could not have envisioned 12 years ago at the world premiere in Dublin.