Costa Rica is a naturally formed volcanic land bridge between North and South America. Part of the Ring of Fire, there are several active volcanoes within the country's borders. It is truly a geologist's dreamland, as many of these volcanoes have roads that take tourists right to their rims.
It is believed that Costa Rica was formed quickly, taking only 50 million years to appear, and appearing a mere 3 million years ago. Two of Earth's major plates, the Cocos and the Caribbean, are responsible for the movement that created this land. Continuing movements in the plates over the years is visible in the distance between the mainland and islands that are now far out to sea.
Volcanoes do a great job of creating rich soil, and that has led to an incredible biodiversity. There are 6 classified active volcanoes and 60 classified dormant in the country. Costa Rica hosts as much as 10% of Earth's biodiversity! It must be true that greatness is born from the furnaces!