Vienna, Austria: Hofburg Palace

Wow, what a complex - 30+ buildings and 2,600 rooms spread over enough space to fill almost three dozen soccer fields. It's the centerpiece of Vienna.

This is where the seat of power has been since 1275. The Habsburgs ruled from here.

There are apartments, museums and exhibits scattered about. You can tour some of the area, but it's so big that you might want to think about allocating your time unless you have a few days to spend in Vienna.

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