Starting today, visitors to London will be able to book free tickets for the new viewing gallery called  Horizon 22, which gets its name from the unique view of the London horizon that you’ll get to see from the skycraper located at 22 Bishopsgate.

The site offers a 300 degree vista from London’s second tallest building. The viewing gallery — at 254 meters above street level — is the highest in Europe that’s free of charge.

The Horizon 22 will open to the public on Wednesday, September 27. Visitors are encouraged book tickets well in advance, with free tickets available from the Horizon 22 website as of today.