Friends race through the city of Istanbul.
Friends face eight challenges in Budapest.
Friends discover some of Glasgow's hidden surprises.
Friends race through the city of Prague.
A couple battles crowds, heat and humidity while racing around Tokyo.
The weather becomes an obstacle for the contestants.
An Australian couple jets off to the port city of Lisbon.
Friends race around Madrid.
Friends race around the city of Amsterdam.
Contestants tackle the city of Singapore for a chance to stay at the world-famous Raffles Hotel.
Londoners use a series of cryptic clues to guide them through the streets of Shanghai.
Participants find challenges at a Book Sellers minaret, an animal tannery, Jardin Majorelle and Jemaa El Fna.
Nick Pettett and Alex Paiva jet off the Kuala Lumpur with hopes of winning a luxurious beach vacation.
Dance, literature and Guiness.
Two Brazilian friends test out the challenges of skiing.
Sub-zero temperatures; Grouse Mountain; totem poles of Stanley Park.
Surf Bather's Life Saving Club; the Sydney Harbour Bridge; New World Wine.
Tai chi in the open air; egg feast; Taoist temple; visiting the races.
A Hindu wedding; a Bollywood film set; laughter club; the Thieves Bazaar.
Table Mountain; penguins at Boulders Beach; fish and flower markets; Robben Island; Chapman's Peak.
Oldest cigar factory in Cuba; Castro's famous cape; bici-taxi; Plaza de la Catedral.
Basilica de Guadelupe; Plaza Garibaldi; art of Frida Kahlo; dining on grasshoppers; wrestlers of the Lucha Libre.
Searching for the famous golden fire hydrant; fortune cookie bakery; Lyle Tutton Tattoo Museum; Alcatraz; Golden Gate Park.
Outdoor cooking; shoe making for the stars.
A couple searches out a 4000-year-old skeleton; the fountain of Trevi.