Being one of the four most major pilgrimage sites of Buddhism, Sarnath has a number of temples built by members of countries with large Buddhist populations. Among these countries is Thailand. (FYI: There is also a Chinese Temple, a Japanese Temple, and a Tibetan Temple.) While the guidebook advice is that these modern temples are skippable, an exception might be made for Wat Thai, which is both nearby to the [unskippable] Archaeology Museum and has a giant Buddha statue.
Here is the sign for the giant Buddha.
Sarnath is the location of the Buddha’s first sermon, and is one of the four major pilgrimage sites for Buddhist.