The Anton Anderson Memorial Tunnel in Alaska connects the city of Whittier to Bear Valley. The reason this tunnel is so spectacular is because it's the longest single-lane highway tunnel in North America, and by long, I mean really long - we're talking over 2 1/2 miles! The tunnel is unique not only because of its length but also because of how the ventilation works. At each entrance, a jet engine propels fresh air through the vents along the length of the tunnel. Cool, huh? These Whittier tunnel photos are so fun to look at!

There are many other interesting facts about this one-of-a-kind tunnel in Alaska; from the safe houses built inside the tunnel to its original construction, the Anton Anderson Memorial Tunnel is truly unique. Scroll through to learn more Whittier tunnel facts and see how cool it looks inside and out.

There is a famous tunnel in Alaska called the Anton Anderson Memorial Tunnel. It is the only way to drive to Whittier, and it is a truly unique experience! The exterior hides the incredible experience you are about to get driving through this tunnel.

In 1943, the military constructed the Anton Anderson Memorial Tunnel, 2.5 miles of train tracks running beneath Maynard Mountain. The tunnel served as the supply route from the port of Whittier to inland Alaska. This mountain tunnel in Alaska is North America’s longest one-lane highway tunnel. It’s also at the end of a stunning scenic drive in Alaska. Portage Road winds through Portage Valley, offering peekaboo views of glaciers and the surrounding mountains. Can you believe the Whittier tunnel length is 2.5 miles?

The tunnel was constructed for the supply route during WWII but when the military abandoned Whittier, the tunnel was put under major construction in order to then become part of the Alaskan Highway. It was developed from train tracks to a slab of concrete with tracks flush to the surface. The design allowed both trains and automobiles to access the tunnel making the Anton Anderson Memorial Tunnel not only the longest tunnel in North America, but the longest multi-use tunnel as well.

We all know how dangerous it is to be stuck inside of a tunnel, especially with exhaust filling the air. So in order to refresh the air and increase the safety of the tunnel, two jet engines were placed at both entrances to force air into the tunnel through vents.

Trains pass through the tunnel when they can, but priority is given to traffic. There is a strict schedule allowing traffic through each end at certain intervals throughout the day. The trains, however, can only pass through when there is little traffic. This makes sense considering how long it would take a whole train to power through 2 1/2 miles of tunnel!

The traffic is controlled by a computer system so there are never any issues getting in and out of Whittier, but the downside is you have to pay a fee to pass through the tunnel. If you ask me, it is worth being able to say you've driven through the longest underground tunnel in North America. Oh yeah, did I mention it is fed fresh air through the creative use of jet engines? Yeah, that's pretty cool.

Lights light the interior, and the experience of driving along the railroad tracks is very cool. It isn’t as bumpy as you would expect, and the sounds you hear as you drive is fun.

Because of its length, safe houses and turn around points are scattered throughout the tunnel for emergency situations. The safe houses are really just small buildings that can be used for earthquake situations or crashes within the tunnel. This is one of the most unique places in Alaska that you can visit next time you want to get to Whittier!

Want to see what it’s like to drive through the tunnel? Check out this video, and drive all the way through the Anton Anderson Memorial Tunnel to Whittier:

Have you driven through the Anton Anderson Memorial Tunnel in Alaska before? Did you know of its unique history? Would you recommend driving this? Let us know in the comments below! Headed out on a road trip? Check out this road trip packing list!

Learn more about Whittier, the town on the other side of the tunnel, when you read more about The Beautiful Alaska Town That’s Surrounded By Water On 3 Sides.