We are all linking in at Beth's blog, The Best Hearts are Crunchy.
An older postcard (around 1900?) showing people viewing Plymouth Rock, Plymouth, MA, under its ornate temple, as befits an American icon. This is the old structure. A newer, bigger one was built in 1920 (according to Wikipedia).
I have visited here myself - it is fenced off so you can't climb all over it, or chip off a piece (as they used to do!). It is still a major tourist attraction, and I am sure there are modern postcards of the rock.