The only saving grace to the Retronaut time-suck is that new content is added at a much slower rate so you don't feel quite as compelled to spend multiple hours each day lost in the site. However, on first viewing, at least, expect to lose some seriously time here.
For me, it all started with this series of photos:
Broken out primarily by decade, the site provides an amazing glimpse into our (mostly US) past. I've always been fascinated by the evolution of culture so this site is an absolute treasure trove for me.
One of Cassandra's favorite entries is this one:
‘While preparing for his role as Travis Bickle in Taxi Driver, De Niro obtained a cab driver’s license, and when on break would pick up a cab and drive around New York for a couple of weeks’
So go. Get lost in the past. And don't expect to come up for air for a quite a while.
I'm sorry and you're welcome.