What is the best way to travel in European countries?

I want to travel to European countries. As there are many countries in this region for travelling, I want to discover slowly one by one. Any suggestion for me to enjoy travelling ? Appreciated if any.

Can you travel from germany to other European countries wih a US Refugee travel document?

I am planning a Eurotrip this xmas and wondering if I can use my Refugee Travel Document to travel from one European country to another. Thanks!