Here’s how David Medzerian starts his OC Register series on cruising in Europe:

It’s no coincidence that most of the world’s great cities are on the water. Rivers, lakes and seas were the original transportation corridors, moving commerce, commodities and people from place to place.

Those very waterways make a cruise ship one of the most popular ways to visit those legendary cities.

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Part two discusses pleasant surprises presented by Estonia.

Part three: St. Petersburg.

The Register also reported on July 3 that European cruise prices are down to as low as $71 per person per day and that airfares may also plunge. Want to see where you can go and what the best prices are? Expedia CruiseShipCenters/Orange County You can also enter to win a free cruise and sign up for monthly email newsletters focused on your selected destinations.

Photo: Dubrovnik, Croatia, with its old walled city, has become a popular destination and port of call for Mediterranean crusies.