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*Pay for two nights at the Lost Iguana Resort & Spa in Arenal, Costa Rica, and receive two more for free. The Two for Two special, which also includes breakfast, starts at $370 per couple for four nights (plus 13 percent tax). Stay through Nov. 15. Set in a rain forest on 120 acres, the 42-room resort offers views of the Arenal Volcano. Info: 011-506-2267-6148, www.lostiguanaresort.com.

*Rail Europe is discounting Britrail passes by 20 percent for travel Nov. 1 through Feb. 28. Prices vary by product. For example, a second-class pass good for three consecutive days of travel in England, Scotland and Wales is now $159, a savings of $40. A first-class flexi-pass good for any 15 days of travel within a two-month period is $779, a savings of $196. Deadline to book the discount is Feb. 14, but pass prices may go up after Dec. 31. Info: (888) 382-7245, www.raileurope.com.

*With Blount Small Ship Adventures, book any of six 2011 Caribbean itineraries, pay in full by Sept. 30 and receive 20 percent off the rate. The cruises range from seven to 11 nights. For example, the seven-night Journey through Central America: Belize to Guatemala now starts at $1,919 per person double, a $480 savings. Depart in February or March. The 11-night Bahama Beachlovers: Caicos to Nassau cruise now starts at $3,023 per person double, a $756 savings; depart March 25. Port charges are $200 to $250 more. Info: (800) 556-7450, www.blountsmallshipadventures.com.

*The Antarctic Dream, an expedition cruise ship, is offering savings of 30 percent on its Nov. 7 departure from Ushuaia, Argentina, to Antarctica. The 11-day trip now starts at $4,830 per person double, including taxes, a savings of $2,070. Also, singles can sign up for the twin-sharing program, and if a cabin mate of the same gender is not found, the company will waive the single supplement. Book by calling (800) 344-6118 by Thursday. Info: www.antarctic.cl/web_eng.

*Go-today.com is offering a London at Its Best package, with prices from $880 per person double (including $184 taxes) for departures Jan. 10 through Feb. 28. Trip includes round-trip air from Washington Dulles to London Heathrow and six nights' lodging with continental breakfasts at the two-star My Place Hotel, near the Earls Court tube station. Priced separately, airfare would cost $688 per person and the hotel about $128 per night, for a total savings of about $380 per couple. Book by Dec. 14. Info: (800) 227-3235, www.go-today.com.

*Book Friendly Planet Travel's six-night A Taste of Thailand by Oct. 6 and save $300 per couple. Price after discount starts at $999 per person double, plus $99 taxes, for the May 11 and 16 departures. Price includes round-trip airfare on China Airlines from Los Angeles to Bangkok; land transportation; accommodations; daily breakfast and one dinner; and guided tours. Other dates available for $100 to $400 more per person. Info: (800) 555-5765, www.friendlyplanet.com.

Restrictions such as blackout dates and advance purchase may apply.