Fraunces Tavern http://www.frauncestavern.com/index2.htm, yes a small hole in the street unlike the garbage can size ones that can be find in the Bowery/East Village. Wall Street has left a few token buildings with historical significance to remind us of old New York. This is the future of the Bowery if the greedy soulless developers have their way. 
On the property of Goldman Sachs you will see these glass windows in the ground to show you historical architectual discoveries dating back a 100 or 200 years back. Maybe we will have that in the East Village, Bowery, West Village as well as the supersizing continues.
