The Lingaraj temple In Bhubaneswar Orissa (Odisha) is dedicated to Harihara – Lord Vishnu and Lord Shiva. 180 feet tall, the temple dates back to 10th century.
Bhubaneswar, also called Ekamra Kshetra having a crore shivalingams in the Brahma Purana is called the temple city of India!
Worship of Vishnu and Shiva coexists at the temple, an example of harmony within Hinduism.