Dooley Vacations An offshoot of Dooley Car Rentals. First night is prebooked. Also Great Britain and France. 877/331-9301, dooleyvacations.com.
EuropeASAP You won't know the airline or the exact departure date until after you book (enter two possible dates and you're guaranteed to get one). Also Great Britain and France. 415/750-5449, europeasap.com.
Ireland.com Ireland packages only. Unless you request otherwise, your first night is prebooked in a hotel near the airport. 800/896-4600, ireland.com/travel.
Sceptre Tours Ireland only. First night is prebooked unless you request otherwise. 800/221-0924, sceptretours.com.
Whether you're planning a summer vacation or just craving some eye candy, we're celebrating National Park Week with 40 trip-inspiring photos of our most treasured—and gorgeous—national parks. From the Southern California desert to the coast of Maine, here are 15 parks we couldn't live without!