Urban Adventures: Hang Gliding in Los Angeles
Why  not add a little adrenaline rush to your next big metropolitan  vacation? Here are 13 sporting adventures to enjoy inside the city  limits.
For a bird's-eye view of the Southern California coast, head to  Dockweiler State Beach and jump off the bluff on your very own hang  glider. You’ll soar above a broad beach fronting the Pacific Ocean, but  not so high that you’ll get in the way of planes taking off and landing  at nearby LAX. Windsports Soaring Center provides all the gear and  instruction you’ll need.
Urban Adventures: Rappelling in Cape Town 
Smack  in the midst of Cape Town, South Africa is Table Mountain National  Park, which serves as an outdoor playground for adventure lovers. Take  the aerial gondola to the top of the mountain — you can also hike or  ascend by mountain bike if you’re feeling energetic — then let the  professionals at Downhill Adventures outfit you for the rappel back  down.
Urban Adventures: Skiing and Snowshoeing in Chicago
Any  weekend when there are 3 or more inches of snow on the ground in the  Windy City, head to Northerly Island, east of Soldier Field. There, you  can strap on a pair of free skis or snowshoes and tramp through 91 acres  of pristine powder. You’ll have incredible views of the Chicago  skyline, including the Shedd Aquarium, the towering John Hancock Center  and the Navy Pier Ferris wheel.
Urban Adventures: Flying the Trapeze in New York
Flying  through the air with the greatest of ease isn’t just for the Flying  Wallendas. At Trapeze School New York, overlooking the Hudson River at  Houston Street in New York, anyone can be a free swinger. The school’s  trained professionals offer advice and pointers for everyone from  grounded first-timers to big-top wannabes. 
Urban Adventures: Kayaking in Miami
The  shallow waters of Miami’s Bear Cut Preserve straddle two worlds. To one  side stand the kinds of mangrove forests that have been here for  centuries, home to manatees, loggerhead turtles, osprey and Little Blue  herons. To the other, the gleaming office towers of downtown Miami soar  skyward. It’s a perfect spot for a leisurely kayaking trip. Guided tours  and rentals are available at Crandon Park.
Urban Adventures: Ziplining in Las Vegas
Sin  City got even more exciting last October with the addition of the  Fremont Street Flightline, a 67-foot-tall high wire ride over the entire  length of the Fremont Street Experience in Las Vegas. For as little as  $15, you can glide through the canyon of downtown casinos, dropping to  as low as 14 feet off the ground, just high enough to clear the heads of  people staring up from below. 
Urban Adventures: Climbing the Sydney Harbour Bridge
The  best views of Sydney, the Opera House, the Blue Mountains and the  surrounding harbor are from atop the Sydney Harbour Bridge. Anyone in  reasonable shape can make the ascent, led by professional guides in  groups of 14 or less. Climb at sunrise, sunset or even at night. For an  even more hands-on experience, take the Discovery Climb through the  inner arch, where you can touch the steel bridge’s rivets.
Urban Adventures: Kiteboarding in San Francisco
When  the wind is streaming through the Golden Gate just right, there’s no  better show in town than the daredevils flying across the water below  San Francisco’s most iconic bridge. Just watching this combination of  surfing, parachuting and human kite-flying from sunny Crissy Field is a  thrill.
Urban Adventures: Stand-up Paddling in Honolulu
Easier  than surfing but harder than kayaking, the ancient Hawaiian tradition  of stand-up paddling is new again. What better place to try it out than  Waikiki, where its renaissance began, and where the sands offer stunning  Diamond Head views. The Waikiki beach boys will hook you up with gear  and instruction. For formal lessons, try Hans Hedemann Surf School at  the Park Shore Hotel.
Urban Adventures: Hot Air Ballooning Over Albuquerque
New  Mexico’s clear blue skies and unique wind currents make it possible to  gently float over Albuquerque any time of year. Contact Rainbow Ryders  or World Balloon to arrange your flight, which usually includes a glass  of champagne. If you visit in October, you’ll be treated to the 40th  annual Albuquerque International Balloon Fiesta, when more than 700  brightly colored airships fill the sky.
Urban Adventures: Tunneling Under Paris
It’s  technically forbidden to descend down under the City of Light in search  of clandestine after-hours parties, secret murals and skeletons of  Parisians past. But that hasn’t stopped a cadre of adventurous folks  known as cataphiles. For a legal taste of Paris’s tunnels and  underground quarries, visit the Catacombs below Place Denfert-Rochereau  or wander the perimeter of the medieval moat in the basement of the  Louvre in Paris.
Urban Adventures: Skydiving in Jacksonville, Fla.
It  doesn’t get much more thrilling than jumping out of a plane flying more  than 2 miles up in the sky. After a half-hour safety briefing, you’re  ready for a tandem jump, where a trained skydiver is responsible for  opening the parachute and steering you safely back to earth. Skydive  Jacksonville in Jacksonville, Fla., also offers accelerated freefall  training classes, in which you learn to skydive solo.
Urban Adventures: Sailing in San Diego
San  Diego is a sailor’s paradise, and not just for the U.S. Navy that bases  its Pacific Fleet here. The city has numerous bays, inlets and islands,  and more than 300 sunny days a year to tickle the fancy of anyone who  wants to sail away. For a spirited ride, climb aboard one of the racing  yachts at Dennis Conner’s America’s Cup Experience.