Naogaon

A Suri-period mosque completed in 1559, nicknamed 'the Black Gem of Bangladesh' for its dark stone. Visitors come for its carved arches, mihrabs and domed prayer hall; it was damaged in the 1897 earthquake but survives as a protected national heritage site. It pairs well with a half-day trip from Naogaon town.

One of the largest Buddhist viharas in South Asia, built in the 8th century under the Pala dynasty; a UNESCO World Heritage Site since 1985. Famous for its remarkable terracotta plaques and central shrine.