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Tropical Adventures is offering 33 percent off its four-day Super Costa Rican Adventure trips.

For example, the Arenal 4-Day Super Adventure trip, which includes three nights at the Arenal Manoa Hotel, plus canyoneering, rafting, horseback riding and zip-line excursions, costs $599 per person double. Regular cost is $899. Add $26 in taxes. Price includes some meals. Book by Sept. 1; travel by Nov. 15. Info: (800) 832-9419, Ext. 302, www.tropicaladventures.com.

Two Sonesta hotels on the Caribbean island of St. Maarten are offering up to 45 percent off. With the Longer You Stay, the Less You Pay deal, save 35 percent on a two-night stay, 40 percent on three nights, and 45 percent on four or more nights at the Sonesta Maho Beach or Sonesta Great Bay Beach resorts.

For a four-night stay, rates begin at $116 per night, instead of the usual $210. The total comes to $559 double, including taxes. Book by Sept. 30 using promo code LUSLUP; stay through Dec. 17. Info: (800) 766-3782, www.sonesta.com/stmaarten.

Avalon Waterways is waiving the single supplement fee on more than a dozen European river cruises departing in October. Options include an 11-day Burgundy and Provence trip departing Oct. 22, with rates from $3,788 per person; the eight-day Paris to Normandy's Landing Beaches, Oct. 3, 10 and 31, $2,848; and the 11-day Legendary Danube, Oct. 22 and 26, $3,548. Add $98 in fees and taxes. The single supplement fee is an additional 50 percent of the per person fare. Book by Aug. 30. Info: (877) 797-8791, www.avalonwaterways.com.

MSC Yacht Club is offering 50 percent off its rates for the second passenger in a suite, plus a $100 shipboard credit per person, on select seven-night European voyages. Cruises depart from Genoa and Civitavecchia, Italy, and Barcelona. Rates start at $2,969 for the first guest and $1,485 for the second guest. Add $55 to $78 per person in fees and taxes. Book by Aug. 31 through a travel agent or by calling (855) 469-2582. Depart by Nov. 6. Info: (877) 665-4655, www.msccruisesusa.com.

Book a room at the Renaissance Baltimore Harborplace Hotel with an American Express card and get 25 percent off. With the deal, rates start at $171.25 per night double, down from $228. A two-night stay comes to $397, including taxes. Two-night minimum, Thursday-Sunday, required. Book by Aug. 31 using promo code ZX3; stay through Sept. 18. Info: (800) 228-9290, www.renaissanceharborplace.com.

Gate 1 Travel has a fly-drive-hotel package to Atlanta, Charleston, S.C., and Savannah, Ga., for not much more than the cost of air and car rental alone. The rate, from $694 per person double, includes air from Reagan National to Atlanta and from Savannah to Reagan National; five nights' lodging (one night in Atlanta, two each in Charleston and Savannah); six-day economy car rental; and three breakfasts. The total for two people is $1,388, including taxes. Booked separately, air for two is about $490; car rental, $675; and lodging, $880. Travel Sept. 10-Dec. 10. Info: (800) 682-3333, www.gate1travel.com.

Deals sell out and availability is not guaranteed. Some restrictions may apply.