1. London City Hall, also known as "The Queen's Building", is the home of the Mayor of London and the London Assembly. It is a striking, glass building located on the south bank of the River Thames near Tower Bridge. Designed by architect Norman Foster, the building features an iconic, spiral shape and cutting-edge, environmentally sustainable design elements. The building opened in 2002 and has since become a prominent symbol of modern London architecture.

2. The working hours of London City Hall are typically Monday to Friday from 8:30 am to 6:00 pm. The phone number for City Hall is +44 20 7983 4000.

3. There is no admission fee to visit London City Hall, as it is a public building. The nearest tube stations are London Bridge and Tower Hill, both approximately a 10-minute walk away. Bus routes serving the area include 42, 78, 343, and RV1. Visitors can also reach City Hall by Thames River Boat services, with Tower Pier being the closest pier.