When Quinn and Jamie are walking in shipyard, there is a boat that can be seen that says Wilmington, NC, which is the city they filmed the show in.
The scene with Nathan and Haley by the river docks is in reference to where Haley and Nathan had their first tutoring session in season 1 episode 3 Are You True. Nathan opened a Cracker Jack box and he gave Haley a bracelet that she kept ever since. The table at the dock is also the same as the one used in season 1.