The journey between Frankfurt and Vienna (Wien) is made on board one of Deutsche Bahn's InterCity Express (ICE) services. Two services in each direction travel on/from Dortmund via Cologne (Koln), both good stations for connecting services. There are also a couple of sleeper train services that are good alternatives to this daytime route, including a EuroNight route between Vienna and Cologne, and another between Amsterdam and Vienna.
Linz is one of Austria's largest cities, located to the north of the country, close to the Czech border. Linz was home to Adolf Hitler during his childhood, before he left for Vienna.
The city is an important rail hub for the country, and it is also host to a variety of river services operating on the Danube.
An epic train journey has recently been re-created by Russian Railways in an attempt to link the Russian capital, Moscow, wih the South of France at Nice. The route is designed (perhaps unsurprisingly) for Russians wanting to catch a bit of sun, and hopes to revive some of the glamour of long distance train journeys.
The two day journey doesn't come cheap, with prices starting at over €300, and going as high as €1200. It isn't your average journey however, with comfortable rooms and furnishings. Each compartment has two berths, which can be shared or sole occupancy. Breakfast is included in ticket prices, and is served in the dining car. There are a number of different (tasty) options to choose from.
The rooms, while comfortable, can be a bit on the warm side, and unfortunately the windows don't open, preventing passengers from making the most of air conditioning au naturale! They also lack power sockets, so you will need to bring plenty of old fashioned reading material, or be prepared to make the most of the wide range of views on offer.
Passports and visas are checked at the Poland/Belarus border. At the border, the wheel gauge is changed, but passengers stay onboard for this process. Passengers who aren't Russian will require a transit visa to travel through Belarus. This can be obtained from the Belarussian Embassy. You will be removed from the train if you do not have an appropriate visa.
Want more information? Shaun Walker has written a good in-depth account of his journey on the Nice to Moscow train for the Independent.
At the moment, your only option if you want to travel by train direct between Vienna (Wien) and Venice (Venezia), is to travel at night. There are a number of services to choose from however, the majority of which travel between Vienna and Rome, also stopping at Venice Mestre.
This page deals with the EuroNight Allegro service 'Don Giovani', also known as the Venice - Vienna Express, which travels between the two cities also passes through Salzburg and Villach. This is the only train between the two cities that gets right to the heart of the two; Venice and Vienna. The alternative night train option goes to Rome, but only calls at Venice Mestre and Vienna Miedling, whereas this one travels to Vienna Westbahnhof and Venice Santa Lucia. If you don't fancy taking the sleeper train, there are indirect daytime services available, changing at Villach.
The service offers a range of accommodation options, including first and second class sleeping compartments, as well as second class couchettes and seating.
When travelling between Vienna (Wien) and Cologne (Koln), you have the choice of either taking the daytime InterCity Express service, or this night time EuroNight sleeper train. Connecting service area available from Cologne to reach Frankfurt and onwards to cities including Amsterdam and Paris.
Onboard this train, a mix of accommodation options are available, including First and Second Class sleeping compartments, as well as Second Class couchettes (4 and 6 berth options).