With the one million dollar prize on the line, the final three teams race from Shenzhen, China, to Santa Barbara, Calif., for the final leg of the Race, and face a gut-wrenching leap of faith: jump off a building more than 150 feet high, and perform the harrowing task of synchronized mountaineering. Phil Keoghan hosts.

The final four teams race for a spot in the finale and a high-stakes foot race to the mat will mark the end of one more team's journey.

The racers visit Lembongan Island, Indonesia, where they face a double U-turn and a gut-wrenching, 40-foot plunge.

A tight race to the Mat in Bali has teams rowing and swimming to a boat for the pit stop, where losers are eliminated by walking the plank.

Teams travel to Dubai where they race camels and swim with sharks.

The race continues in Tbilisi, Georgia, where teams learn to make a traditional candy and go deep into the trenches at an old Georgian winery.

For the first time in The Amazing Race history, teams travel to Yerevan, Armenia, where an express pass is on the line for the winner of the leg.

The race continues in Chamonix, France, where teams climb 15,000 feet in the French Alps. One duo's race is threatened when they drop a clue down a mountain.

The race continues in Geneva, Switzerland, where a romance blossoms between two racers. Later, teams get caught in one of the largest-ever footraces to the mat for first place.

The race continues in Cartagena, Colombia, where claustrophobia threatens to prevent one racer from going deep into catacombs to retrieve a clue.

The race continues in Cartagena, Colombia, where teams go mud diving for emeralds in a volcano.

- In a series first, 11 new teams of social media stars depart from their own homes all across the country and head for Mexico City, where they set off fireworks and dig deep at an archaeological Roadblock.