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 seat of Rupandehi District although Butwal to the north is the district's largest city. It is also known as "Gateway of Lumbini". Lumbini, the birthplace of Gautama Buddha is 25 km away to the west of Siddharthanagar.