What are the options for an Indian passport holder traveling to Thailand and Cambodia with a single entry visa?

An Indian passport holder traveling to Bangkok on a single-entry visa who plans to visit Cambodia should consider two options: 1) Obtain a re-entry permit from the Chiang Watthana Immigration Office in Bangkok before traveling to Cambodia. 2) Leave for Cambodia and return to Bangkok, seeking a visa on arrival, which is not recommended for a single-entry tourist visa holder. Comments emphasize the importance of securing a tourist visa from a Thai consulate in India before the trip, rather than relying on a visa on arrival. After returning from Cambodia, the individual may need to report to the same immigration office but the enforcement of reporting is not strict in Bangkok. The primary immigration office for re-entry permits in Bangkok is located at Chaengwatthana, but permits can also be obtained at the airport.