1. Sri Harmandir Sahib, also known as Golden Temple, is plated with 750 kg of pure gold, showcasing incredible artistry.
2. The temple's foundation was laid by a Muslim saint, Mian Mir, signifying religious unity.
3. It houses India’s largest free kitchen, serving about 100,000 meals daily regardless of religion, caste or creed.
4. The holy book, Guru Granth Sahib within the temple contains hymns from Hindu and Muslim saints.
5. A unique feature of this shrine is that it has entrances from all four directions, signifying that it's open to all.

1. Best Time to Visit: Sri Harmandir Sahib, also known as the Golden Temple, is open all year round, but the best time to visit is between October and March when the weather is cooler. The temple is busiest during festivals such as Diwali and Vaisakhi, so plan your trip accordingly if you wish to avoid large crowds.

2. Popular Spots: Apart from the main Golden Temple, make sure to visit the Central Sikh Museum located within the temple premises. Also, don't miss the mesmerizing 'Palki Sahib' procession that happens every morning and night when the Guru Granth Sahib is carried in and out of the sanctum.

3. Dining: When visiting the temple, do not miss the 'Langar', a free vegetarian meal provided by the temple to all visitors irrespective of their faith. The concept of langar embodies the Sikh principle of equality and is an impressive sight to witness.

4. Money-Saving: Entrance to the Golden Temple is free, and so is the Langar. Free accommodation is also available in the temple complex for visitors, although it is quite basic.

5. Itinerary Planning: Allocate at least two to three hours for your visit to fully take in the temple. The temple is open 24 hours, so consider visiting early in the morning or late at night when it's less crowded. Apart from the temple, Amritsar also has other attractions like Jallianwala Bagh and Durgiana Temple which can be covered in the same day.