Surabaya  is Indonesia's second-largest city, and the capital of the province of East Java. It is located on the northern shore of eastern Java at the mouth of the Mas River and at the side of the Madura Strait.
Surabaya is the location of the only synagogue in Indonesia, although it is currently inactive.
Surabaya's zoo, opened in 1916, was the first in the world to have successfully bred orangutans in captivity.
Other attractions include:

• Grand Mosque of Surabaya, the largest mosque in East Java
• Cheng Ho Mosque, the first mosque in Indonesia built with a Chinese style architecture
• Jales Veva Jaya Mahe Monument, a large, admiral-like statue which commemorates the Indonesian Navy
• Mpu Tantular Museum, has a large collection of ancient Javanese artifacts