You can also just hop on, without any planning, in Germany anyway, and the price will only be expensive, not outrageous.
An ICE is no different than a bus in this regard. A flight is a totally different story, probably planned weeks in advance and stress starts on the morning the day of.
An ICE is no different than a bus in this regard. A flight is a totally different story, probably planned weeks in advance and stress starts on the morning the day of.