The highway into Ha Tien is as pretty as any in Vietnam.
When the red dirt road was smooth and flat, it was heavenly motorcycling: endless rice paddies, thatched village huts, the Gulf of Thailand, small groves of forest, and bursts of limestone hills.
War with Cambodia was a recent thing, and the border had not yet opened. Likewise, travel to offshore Phu Quoc was not permitted. Those two changes should have brought larger numbers of visitors to the town, but I expect it remains off the radar of most visitors.