The largest underground bus station in Europe is Kamppi Centre in Helsinki, Finland completed in 2006.
The terminal cost 100 million Euro to complete and took 3 years to design and build.
[6] Preston Bus Station in Preston, England, built in 1969 and later heritage-listed, was described in 2014 as "depending on how you measure it, the largest bus station in the world, the second-biggest in Europe, and the longest in Europe".
[citation needed] The terminal is located in Midtown at 625 Eighth Avenue between 40th Street and 42nd Street, one block east of the Lincoln Tunnel and one block west of Times Square.
[9] It is also the 2nd busiest in the world, serving about 90,000 people per weekday in 300 bus lines on its 89 platforms (72 for boarding and 17 for deboarding), with services to over 1,000 cities over the country and South America.