The odd one out in the given options is 'Santa Clara Valley'. Here's why:

1. Silent Valley:
Silent Valley is a national park located in the Nilgiri Hills of Kerala, India. It is known for its rich biodiversity and unique ecosystem. The name "Silent Valley" is derived from the absence of the usual sounds of cicadas and birds due to the dense forest cover. It is a famous tourist destination and a protected area for various endangered species.

2. Indus Valley:
The Indus Valley is an ancient civilization that flourished around the Indus River basin in present-day Pakistan and northwest India. It is one of the world's oldest urban civilizations, dating back to the Bronze Age. The Indus Valley civilization is known for its well-planned cities, advanced drainage systems, and sophisticated trading networks. It played a significant role in the development of South Asia's cultural and historical heritage.

3. Damodar Valley:
The Damodar Valley is a river valley in eastern India, primarily located in the state of Jharkhand and partially in West Bengal. It is formed by the Damodar River and its tributaries. The Damodar Valley is known for its rich coal reserves and is a major industrial region of India. The Damodar Valley Corporation (DVC) was established to harness the water and power resources of the valley for irrigation, flood control, and electricity generation.

4. Santa Clara Valley:
Santa Clara Valley is located in California, United States. It is also known as Silicon Valley, as it is the global hub for high-tech innovation and development. The region is home to numerous technology companies, startups, and research institutions. Santa Clara Valley is renowned for its contribution to the field of information technology and has a significant impact on the global economy.

Based on the given options, 'Santa Clara Valley' stands out as it is the only option that does not relate to a geographical or historical location. Instead, it represents a specific region associated with technological advancements and the IT industry.