Trowulan is in East Java.
From Surabaya Terminal Bungurasih take a bus headed for Jombang and ask to get off at "Trowulan perempatan, lampu merah" (Trowulan four ways, traffic lights). Your first destination, Trowulan Museum is a 1 km walk (or becak / ojek ride) on the left road. The bus ticket costs Rp. 7000 and takes approximately 1 hour.
Car / Motorbike
Trowulan is 60 km down the Surabaya-Solo road. The road starts near Bungurasih bus terminal. Follow the signs to Krian and keep going. At Trowulan four ways, traffic lights your first destination, Trowulan Museum is 1 km on the left road.
Candi Tikus Bajang Ratu
Candi Brahu .
The Islamic tomb of Champa Princess
Candi Menak Jingga
Sandals are popular. Expect to pay Rp. 10,000 See "eat"
There are numerous warung along the route. Popular dishes include Bakso and Es Degan. By the Troloyo Grave and Pendopo Agung there are numerous Pentol sellers.
If you're thinking of anything alcoholic you may need to make a 50 km journey to Alfamart or Indomaret. For something a little more innocent try es degan (sweetened young coconut juice) or cheap (Rp. 1000!) ice cream.