Photo by Ben Salter.

Your weekly roundup of the hottest travel links across the net:

1. Ask just about any traveler and they’ll tell you about the inordinate amount of time spent getting to their destination (this is especially true of Australians who have to travel a really long way to get just about anywhere!). But time spent on transportation doesn’t have to be boring – in fact, it’s the perfect opportunity to plan your trip, take notes or simply relax. This post details 11 ways to use your time on trains productively, although the ideas can easily be adapted to other forms of transport as well.

2. Berlin is a city packed with historic sites, but what you may not realize is that there’s as much to see below ground as there is above. Tourists can visit the subterranean bunkers of Berlin, which are essentially bomb shelters left over from the Cold War. The Nazi torture cells and escape tunnels are grim reminders of the city’s dark past.

3. Finally, if you’re feeling crafty and want to make something you can use for your travels, check out this DIY luggage tag tutorial. Seems like the kind of thing that would make a cute farewell gift as well.