This site lists airport gyms, airport exercise clubs, and airport fitness centers available in and around select popular US (and now Canadian) airports today.
This site lists information on travelling with your bicycle.
Where to Ride, Run, Hike, Kayak
The site Map My Ride lists potential rides, runs, MTB rides, kayak routes etc, in almost any location in the U.S.
This web site lists places to run around the world, although it's primary focus is the U.S. It lists over 1500 places to run in over 900 cities.
This is reputed to the the world's largest database of hiking trails. The web site has resources for the avid hiker, with links to information in most countries where hikers are found. Each country link can include General pages with hiking resources (including logs kept by hikers) and links to organizations and clubs.
More information about more swimming pools in more places than on any other resource! More swimming links than any of the swimming indexes!