Jack Cork is shocked by the progress Burnley have made since joined them on loan in 2010.
Cork joined the Clarets last summer from Swansea and was pivotal in their seventh-placed Premier League finish.
This means Burnley will compete in the Europa League, which is a feat Cork hardly expected when he left the club.
"It's grown in such a short time. It was only eight years ago," said Cork of the first time he joined the Clarets.
"For me coming back I didn't think this could be built so quickly and change so much.
"There's the new training ground, new facilities, a lot more staff. We used to get changed at the stadium, drive down to the (training) pitches, then get back in the cars and have dinner in one of the boxes (at the ground).
"That was in the Premier League at the time. It was crazy. The investment in players and facilities around the club is crazy."