10-day/9-night cruise-tour of the NETHERLANDS and BELGIUM aboard 135-passenger River Duchess. Departs April 1, 10 & 19, 2014. Highlights: In Amsterdam, Rijksmuseum or Van Gogh Museum/seven million tulips at Keukenhof Gardens/windmills in Kinderdijk/medieval Bruges/Antwerp. Cruise, April 1 departure, from $3,694 (category-4 cabin) to $5,844 (suite) or, April 19 departure, $4,594-$6,744. World Luxury Cruise Vacations (San Antonio, TX; 877/579-7447).