Adisorn Hemthanon, Phu Kradueng National Park chief, extended the invitation when tourists, who visited Phu Kradueng in Phu Kradueng district of Loei province on Monday morning, were treated to a spectacular view of the sea of mist.
Adisorn said the mist could be seen along the trekking path to the Nok Aen Cliff and the viewpoint for watching the sunrise.
The park chief credited the mist to the cool 15 degrees Celsius weather in the morning and light rains throughout Sunday night.
The park chief added that tourists continued to visit the mountaintop over the weekends.
On Sunday, 719 tourists visited the mountaintop, he added.
He said light rains in recent days had turned grass and trees on the mountaintop lush green. And the rains added clear water to several waterfalls on the mountain.
All of these added to the romantic atmosphere for tourists to visit for Valentine's day celebration, he added.
Phu Kradueng rises 1,316 metres above the median sea level.