Trains from Paris at least hourly, normally about €18 each way. Journey time one hour ten minutes for fast Corail trains, slightly longer for stopping TER services.
Amiens has a decent bus system. It is EUR 1.20 for each ticket.
Amiens's cathedral is one of the major works of the French Gothic style, with a fine facade and interesting sculptures.
The Hortillonages, market gardens separated by small canals, are visitable by boat.
The city is small and attractive and has a fair amount of people traversing the city streets in the summer time.