Not all those who wander are lost
Enjoy the journey.
From Kathmandu: If you have your own vehicle, Tansen is a seven-hour drive from Kathmandu. Directly night buses are also available, departing from Gongabu bus park in Kathmandu. You can also fly to Bhairawa (25 mins) and drive up to Tansen (1 hr 30 mins).

From Lumbini: You can hire a taxi or take a bus to Tansen via Butwal (2 hr) or drive up directly if you have your own vehicle.

From Pokhara: The Sunauli-Pokhara highway gets you to Tansen in 4 hrs if you have your own vehicle. You can take a local bus and get off at Bartung, from where you can take another bus or jeep up to Tansen (4 kms).

From Chitwan: From Narayanghat, Tansen is a 3 hr drive via Butwal. If traveling by public transport, hop on a bus to Butwal, and then find a bus or jeep to Tansen.