The Thai baht is the in-use currency of Thailand,
and is also used in some neighbouring countries as a second currency.
The dollar, euro, etc are not usually accepted in Thailand. The very few places that do will charge a painful exchange rate.
Bangkok Isn’t Bangkok
Bangkok isn’t called Bangkok at all. Its called Krungthep in conversation, and Krungthepmahanakhon for official purposes.
The capital city of Thailand has the longest place name in the world.
Thailand is 543 Years Ahead
Thailand’s year is 543 years ahead of the west, so 2019 in the west is 2562 in Thailand. The reason is that it follows the Buddhist era rather than the christian era.
The Price For You
Dual pricing (a price higher for foreigners than for Thais) is common at many national parks, theme parks, palaces and temples, museums, etc.
This photo shows 10 baht for children and 50 baht for adults.