Real Life Cities 2: Dublin
If we're talking about virtual recreations of real life sites you have to visit Second Life's version of Dublin. Many people who have visited Dublin in meatspace will recognise the virtual version.
Dublin in SL also hosts one of the most popular meetingpoints in Second Life, the Blarney Stone pub. Aside from meeting the regulars and dancing. The sims media url usually streams real life Irish radio, but the Blarney Stone is a regular site for musicians to simulcast. Many young artists perform on the small stage behind the dance floor. Due to its popularity the pub was one of the first places used by Diageo to promote their virtual bar.
The heavy build urban sim and the popularity of the Blarney Stone have a downside; the sim is usually very slow to stream and at happy hour many teleports are rejected because of this.
Next to old fashioned Dublin a new sim was added recently, shaped like the traditional Irish four-leaf clover. Unfortunately it is not open to visitors yet.