Yes, there are several famous temples in South India where Lord Shiva (Eshwar) and Lord Vishnu (Perumal) are worshipped together in the same complex or even as a single deity. This represents the concept of Harihara, showing that both are one and the same.
Here are the most prominent ones:
1. Sankaranarayanar Temple (Sankarankovil)
This is perhaps the most famous example. The main deity, Sankaranarayanar, is a combined form: the right side is Lord Shiva (Sankara) and the left side is Lord Vishnu (Narayana).
* Significance: It was built to resolve the debate between devotees of Shiva and Vishnu, proving they are equal.
* Location: Tenkasi District, Tamil Nadu.
2. Thanumalayan Temple (Suchindram)
The name itself explains the union: Stanu (Shiva), Mal (Vishnu), and Ayan (Brahma).
* Unique Feature: The main lingam represents all three deities (the Trimurti) in a single form.
* Location: Near Kanyakumari, Tamil Nadu.
3. Ekambareswarar Temple (Kanchipuram)
While this is a major Shiva temple (representing the element of Earth), it houses one of the 108 Divya Desams (Vishnu temples) within its own corridors.
* The Shrine: The Nilathingal Thundam Perumal shrine is located inside the first precinct of the Ekambareswarar temple.
* Location: Kanchipuram, Tamil Nadu.
4. Harihareshwara Temple (Harihar)
Similar to Sankarankovil, the deity here is Harihara, a fusion of Vishnu (Hari) and Shiva (Hara).
* Architecture: It is a stunning example of Hoysala architecture.
* Location: Davanagere District, Karnataka.
5. Thiruparkadal (Prasanna Venkatesa Perumal Temple)
In this unique temple, Lord Vishnu stands on a Shiva Lingam pedestal.
* The Legend: It is said that to show a devotee that both are the same, Vishnu appeared standing atop the Lingam.
* Location: Near Walajapet (Vellore district), Tamil Nadu.
Summary Table
| Temple Name | Combined Form / Separate Shrines | Primary Location |
|—|—|—|
| Sankarankovil | Single Idol (Half Shiva, Half Vishnu) | Tenkasi, TN |
| Suchindram | Single Lingam (Trimurti) | Kanyakumari, TN |
| Kanchipuram | Vishnu Shrine inside Shiva Temple | Kanchipuram, TN |
| Thiruparkadal | Vishnu standing on Shiva Lingam | Vellore, TN |