Humans are not the only tourists interested in the Trans-Alaska pipeline - the caribou are flocking to this man-made wonder as well but in this article Kevin Retief concentrates on Alaska's two legged tourists and explores the options for those looking for a sighting of the Trans-Alaska pipeline.

What travels at about six miles per hour, crosses over 800 rivers and streams as well as three mountain passes, and takes six days to reach its destination?

You've got it! Oil!

Every day, about 1.8 million barrels of oil travel down the Trans-Alaska Pipeline from the Prudhoe Bay oil fields in North Alaska to the port of Valdez in Prince William Sound.

Slightly less than half of the $8 billion pipeline built in the mid 70s is buried. The remaining pipeline is on 78,000 aboveground supports, located 60 feet apart following a zigzag pattern to relieve stress from the traveling hot oil.

Winding from the Arctic region of Prudhoe Bay to the ice-free port of Valdez, the pipeline is visible near Fairbanks, Glennallen, Delta Junction, Valdez and along the Dalton and Richardson Highways.

It is little wonder that the 800 miles of this 48-inch pipe has become one of Alaska's "must see" attractions. But interestingly enough - it is not just the humans who flock to be near it.

Apparently, and despite conservationists' fears that the pipeline would disrupt the animals' migration routes, it appears that the caribou are unexpectedly attracted to the warmth of the pipeline. The oil in the pipeline is warmed to ease its flow through the pipe, and caribou have been spotted near the pipeline in winter supposedly drawing comfort and support from the heat. There are even some reports of caribou giving birth next to it.

In the summer, the caribou are known to congregate under the pipeline in order to get away from the mosquitos.

For humans, those wanting to see this man-made wonder for themselves, Fairbanks is a good place to start.

The Alyeska Pipeline Visitor Center, less than 10 miles from downtown Fairbanks, attracts thousands of visitors each year. From early May through mid-September this is the ideal place to view the pipeline and learn about its history and how it is operated.

If you want to see more of the pipeline than this, Fairbanks is also the ideal launch pad for bus tours and flight tours to Prudhoe Bay, but you need to be aware that valid picture identification like a passport or driver's license is necessary in order to take part in the tour of the Prudhoe Bay oil fields, and entrance to the oil fields is only available through commercial tour operators.

If that doesn't matter to you, you could always drive yourself to Prudhoe Bay, but be warned that most rental companies will not allow you to drive their cars on the Dalton Highway - which really should tell you enough not to take your own car along this route.

But this is ,000 tankers have loaded there. At the time of its construction it was the biggest privately funded construction project and is today one of the largest pipeline systems in the world.

Astronauts say they can see it from space and the caribou like it because it's warm!

A "must-see" attraction indeed.

About The Author A freelance travel writer for a number of years, Kevin Retief now publishes several travel web sites including Travel Tidings Alaska at http://www.traveltidingsalaska.com - a free Alaska travel guide about Alaska tourism and Alaska vacations with travel information on everything from Alaskan cruises to cheap hotel rates, maps and weather.