Siddharthanagar (formerly called Bhairahawa) is a municipality near the Indian border on the Outer Terai plains of Nepal, 265 km (165 mi) west of Kathmandu Nepal's capital. Siddharthanagar is the administrative headquarters of Rupandehi District. It is known as "Gateway of Lumbini." Lumbini, the birthplace of Gautama Buddha is 25 km to the west. Bhairahawa is under the administration of Siddharthanagar nagarpalika (municipality) so often known as Siddharthanagar.