I would love for them to go to Brazil and do a Switchback of the dog walking from Season 5. IIRC, that killed the last Big Brother contestant on the race.
graytex, that was an OK task, but:
1. it was a DETOUR Perro or Tango and
2. It was in Buenos Aires where dog walking is a common event, not anywhere in Brazil
ROADBLOCKS in Brazil, which I don't think are close to the standard for Switchbacks, were:
AR13, ep. 2 - In Caucaia, one team member must find the name of their next destination on an advertisement painted on the wall of the park.
AR9, ep. 2 - In Sao Paulo, teams had to climb one of three stairwells 400 feet (120 m) on a fire escape of the Edificio Copan. Once on the top, their arrival order deteremines when they get to put on a harness and rappel down the building.
AR2, ep. 2 - In Foz do Iguacu, Parque Nacional do Iguašu leaving from Macuco Safari Dock, take speedboat into Iguašu Falls and spot the flag at the top.