Board Thread:Questions and Answers/@comment-117.196.137.191-20150111114409/@comment-4473890-20150111125904

Your #2 scene is from the second episode of the twelfth season (2007), in which teams over a ditch in the  as part of a Roadblock. More recently, it reappeared in the ninth episode of the twenty-first season (2012) as part of a Switchback. Although I'm pretty sure the one you remembered was from Season 12 back in 2007.

Hope this helps refresh your Amazing Race memory! :D