Maps.me – Find Your Way When You do not Have the Internet
Sometimes we have the Internet the country we are staying but outside of the country, traveling maybe hard. (From now on if you have any provider in one of the EU countries then you can use the same provider all around the EU countries. It is quite awesome right! They call this service EU-Roaming and pretty much every SIM card has this feature but just in case, do not forget to check it out! For US, it is basic. You can use the same provider everywhere in US.)
In case you do not have the Internet while you are traveling, you can use Maps.me and after you download the place you will be going then you can search any place on that area, it will help you to find your way.
It is quite easy but do not forget to download the place you are going first.

Enjoy your trip!