Passenger bus runs between the airport and downtown Iquitos. Iquitos is also the ideal place for tourists and travelers are encouraged to go into sheltered areas such as parks and forest reserves where there are still places to discover and have never been explored. The city is a curiosity in itself: isolated by impenetrable density of the jungle, Iquitos is reachable only by river or air, being outside the Amazon River in the region of Loreto. The appearance of the city, for the most part, is that of a village, populated by the tribe of Iquitos, from whom the city finally took the name to be established in line with the gold rush and porteriormente and the passion of rubber .