Drinking Water Most hotel zone venues have safe drinking water (hotels will indicate this in the rooms). If visitors stray from the beaten path or have delicate stomachs, bottled water is advisable.

Documentation U.S. visitors need a tourist card to enter and leave Mexico. A valid passport or birth certificate for proof of citizenship is also useful. Travelers from other countries may need a visa.

Currency Mexican peso. The rate of exchange against the U.S. dollar fluctuates.

Tipping Tips are rarely included on the bill. A gratuity of 10 to 15 percent, depending on the quality of the service, is appreciated.

Electricity Same as in the U.S.