Located in northern Bulgaria is a unique and stunning karst cave called Devetashka cave. It is home to nearly 30 000 bats and has been inhabited by humans during almost every historical era. The earliest traces of human presence date back to the Early Stone Age (70 000 BC).
There’s a restaurant inside of a cave that’s inside of a cliff on the coast of Italy where you can eat dinner and watch the sun set over the Adriatic Sea. Nobility have been hanging out there since the 1700s. Source
I really love undertale, recently started playing it and its a really cute and interesting game. I love the characters and their different personalities. I especially like Sans and Undyne. Here is some fanart.