There is an old saying “a dollar doesn't have the same value as it used to”, and is partially true if you live in US or Europe. However, you will be surprised with the value that one dollar has in some other countries of the world. For example, in Philippines, you could enjoy a 30 - 45 minutes of foot massage with a single dollar and in Egypt you could have a koshary plate. The possibilities are countless so if you are a traveller of world, make every dollar to matter.
The infographic from the whenonearth will give you a taste!