Collect your passport and government-issued photo ID (passports are preferred, and sometimes they are the only option allowed). Look up the embassy you wish to visit. For example, if you wish to go to the Brazilian Embassy in Washington, D.C., use an embassy database (embassy.org) to get the embassy's contact information and address.
Read the embassy website to learn the building's hours and rules for admittance and to find out whether you need to schedule a appointment. Check also for organized tours led by embassy staff.
Make the appointment, or, if the embassy has open hours, plan to visit during that time.
Present your passport and/or ID to the soldier or guard as you enter the embassy. Be aware that technically, you are leaving U.S. soil. Follow all rules and posted regulations, or those given to you by the tour host, guard or soldier.
Act appropriately. You are a visitor in another country's embassy.
