What is the name of the tallest building in London that is open for viewing on the South Bank?

The Shard is the tallest building in London, standing at 310 meters (1,016 feet) tall, and it features a public viewing gallery that offers stunning panoramic views of the city. Located on the South Bank of the River Thames, The Shard stands out due to its distinctive glass façade and modern design, making it not only a prominent part of London's skyline but also a popular tourist attraction.

Visitors can access Observation Decks on the 68th and 69th floors, and even higher points still offer extraordinary views. This accessibility to the public for viewing makes it a standout choice compared to other significant buildings in London, such as The Walkie Talkie, which, while iconic, does not reach the same height and viewing potential for tourists. Similarly, The Gherkin and The Cheesegrater, though notable in their architecture, do not offer public viewing platforms as extensive as The Shard does. The combination of its height, design, and viewing opportunities places The Shard in a unique position, making it the clear choice for the tallest building in London open for public viewing on the South Bank.