North India is home to a multitude of temples that are not only religious centers but also architectural marvels. While it's challenging to list the "most visited" temples definitively, I can provide you with a list of some of the well-known and frequently visited temples in North India.
https://extadio.com/

Vaishno Devi Temple, Katra, Jammu and Kashmir: Located in the Trikuta Mountains, this temple dedicated to Goddess Vaishno Devi is one of the most visited in India. Pilgrims trek uphill to reach the temple.

Golden Temple (Harmandir Sahib), Amritsar, Punjab: The holiest shrine in Sikhism, the Golden Temple is renowned for its stunning architecture and the sacred Amrit Sarovar (Pool of Nectar).

Kedarnath Temple, Uttarakhand: Situated in the Himalayas, this temple dedicated to Lord Shiva is a part of the Chota Char Dham Yatra and attracts devotees and trekkers alike.

Badrinath Temple, Uttarakhand: Another significant temple in the Char Dham Yatra, Badrinath Temple is dedicated to Lord Vishnu and is known for its beautiful location in the Garhwal Himalayas.

Jagannath Temple, Puri, Odisha: Although in the eastern part of India, the Jagannath Temple is visited by people from all over the country. It's famous for the annual Rath Yatra.

Kashi Vishwanath Temple, Varanasi, Uttar Pradesh: Located in the ancient city of Varanasi, this temple is dedicated to Lord Shiva and is one of the holiest in Hinduism.

Akshardham Temple, Delhi: This modern architectural marvel dedicated to Lord Swaminarayan showcases India's rich cultural and spiritual heritage.

Meenakshi Temple, Madurai, Tamil Nadu: While not in North India, Meenakshi Temple is a popular pilgrimage site for people from all over India due to its historical and architectural significance.

Mansa Devi Temple, Haridwar, Uttarakhand: Located atop the Bilwa Parvat in Haridwar, this temple is dedicated to Goddess Mansa Devi and offers panoramic views of the city.

Birla Mandir (Laxminarayan Temple), Delhi: This modern Hindu temple is dedicated to Lord Vishnu and Goddess Lakshmi and is known for its intricate carvings and stunning architecture.

Please note that the popularity and significance of temples can vary based on personal beliefs, regional importance, and religious traditions. These are just a few examples of the many temples you can find in North India, each with its unique charm and historical importance.