Rachel Rosales and TK Erwin finished first in The Last Frontier to win CBS' "The Amazing Race" and the reality TV show's $1 million prize.

During the around-the-world race's final leg in Anchorage, Alaska, the couple from Huntington Beach, Calif., searched through tanks filled with live crabs, scaled the side of a glacier, soared through the air in a helicopter and solved a complicated puzzle before crossing the finish line at Girdwood Airport.

"Nice guys can definitely finish first," the dreadlocked Erwin said after their win.

Erwin, 22, and Rosales, 23, outraced father-and-daughter team Ronald and Christina Hsu and grandfather-and-grandson team Donald Jerousek and Nicolas Fulks during the race's final leg.

"I knew it was going to be crucial to stay calm," Rosales said, referring to the complex puzzle composed of objects from previous challenges that contestants had to figure out before racing to the finish line.

In the twelfth edition of "The Amazing Race," racers trekked from the Playboy Mansion in Los Angeles through Ireland, the Netherlands, Burkina Faso, Lithuania, Croatia, Italy, India, Japan and Taiwan to their final destination in Alaska.