Visa on Arrival in Thailand
A Visa on Arrival is for when you arrive in Thailand without a visa,
but you are from one of the 21 countries that can purchase a visa on arrival.
This country list does not include UK or USA and a majority of Europe.
The visa is 2,000 THB and allows you to stay for 15 days.
A visa is put in to your passport and then stamped with an entry stamp telling you when you need to leave.
This is the full list, and includes China and India:
Tourists entering on Visa on Arrival can possibly get their stay extended by visiting an immigration office and applying for a visa extension.
You are likely to only get 48 hour or 7 day extension.