One US dollar is equivalent to about GTQ7. US dollars are highly regarded and can be exchanged in most small towns at a rate unfavourable to travellers; you will most likely have difficulty using other currencies. ATMs can be found in the major towns but do not expect to find them in every tourist spot. It is fairly easy to find yourself in a town without an ATM or a place to change money. Banks are also very useful, such as Banrural, which is commonly found throughout Guatemalan cities and towns. Currently, Banrural (experienced in Rio Dulce) limits exchange to 125 USD / day, and a passport is required.