There was a film by that name in 1992, starring Gabriel Byrne & Ellen Barkin. It was about Irish Travellers and a horse named Tir-na-nog.
There was, also, a TV Mini-series by that name in 2005, starring Matthew Settle and Josh Brolin. It was about the American expansion of the 19th century.
Both are available at www.amazon.com and other e-tailers.
