Citizens of 42 different countries can enter Thailand without a visa and be granted a free visa at the airport for a 30-day stay. (NOTE : Overland arrivals only receive a 15-day visa).
All persons wishing to enter Myanmar must have a visa and a passport with at least 6 months validity. Visas must be arranged prior to traveling to Myanmar. Pre-arranged Visa on Arrival is available for all travelers but must be applied for at least 2 weeks.
All Cambodian visas for entering the Kingdom of Cambodia can be applied by mail or in person at the Royal Embassy of Cambodia in Washington DC.
Tourist Visas for Laos are available at Lao embassies or consulates abroad and at most Laos ports of entry (known as Visa on arrival).
Unless you are from the countries which have signed bilateral or unilateral visa exemption agreement with Vietnam, including South Korea, Japan, Scandinavians and most Asean countries, you need a passport (valid for at least six months) and an tourist visa in order to visit Vietnam.
