<human>: I'm planning a vacation to Europe. What are some things that I shouldn't miss?
<bot>: 
1. Visiting the Eiffel Tower in Paris, France.
2. Taking a boat tour of Amsterdam's canals.
3. Visiting the Colosseum in Rome, Italy.
4. Experiencing the nightlife of Barcelona, Spain.
5. Visiting the Palace of Versailles outside of Paris.