Bagan's claim to fame is that between the 7th and 13th century 10,000 temples, pagodas and monasteries where built on the plains just outside of the city. In 1975 there was a massive earthquake and many where destroyed with approx 2200 surviving today.
Many new ones are being built as well by the wealthy to gain merit. Although very popular with tourists, because of the many pagodas an laid back atmosphere, it still retains its small city feel.