If your ideal vacation involves hiking, climbing, skiing, surfing and the like, add popular travel blog Gadling.com to your list of "must clicks." The site caters to what it calls the "engaged traveler," those who enjoy getaways filled with pure adrenaline and adventure ... Think rafting in the Grand Canyon, trekking through the Himalayas ... or a unicycle tour of Vietnam. Gadling also keeps readers abreast of travel deals, trends and the latest gear.

Recent featured destination/activities on Gadling.com include scuba diving and playing tennis in a cave and a look at the world's best islands.