The bas beliefs at Taq-e Boston (Arch of the Garden), 6 km northeast of Kermanshah, are, with one exception, the only Sassanian rock carvings outside Fars Province; they are also the latest of Sassanian carvings. The Sassanians carved majestic sculptures out of the living rock, mostly in their native province of Fars, designed to exalt their kings and perpetuate their fame. Taq-e Bostan is discovered along the avenue now floodlit: the favourite excursion place of the townspeople. The bas-reliefs decorate two grottoes, large and small, which have been cut out of a rock cliff rising high above a pool of clear water, which recalls the Sassanian site at Darab (Fars Province).