A big problem with traveling is the surprise expenses. You can easily spend more than planned, because of extra costs like baggage fees or changing money. Even if you have a budget, it's hard to stick to it with tourist attractions and activities that you didn't plan for.

A common problem is the crowds at tourist spots and long lines. Famous places are often too crowded, especially in high season, which can make the visit less fun. It's frustrating and tiring to wait in line for a long time to see a well-known place or attraction.