Vietnam
These beautiful terraces are used for vietnams staple crop, rice, which has been growing there for thousands of years. This yellow color appears towards the end of September and/or October and typically only lasts for a few months, it signals that it is the ripen rice season. Other times of the year you’ll see these terraces displaying beautiful greens.
The most noted areas in which you can find these terraces are Mu Cang Chai, Sa Pa, Hoang Su Phi; needless to say there are many others that may be just as beautiful just not as well-known, crowded and/or touristy. (Most of the touring companies in Vietnam have various options to hike through these golden yellow fields!)
A great way to let your senses truly experience Vietnam the non-touristy way is through a week tour on motorbike; although there are shorter options as well. Not only will you be safely driven by a well-instructed driver, but you will see almost all of Vietnam (the sought after well-known destinations as well as the more remote destinations) without having to peer through fogged up windows.
A highly recommended company to do this motoride tour with is called Hue Riders.
http://www.hueriders.com/index.html