With breakthroughs in technology every year, from improvements in transportation to new trip planning applications, wanderlusts can travel to more secluded places. However, there are some places that will remain off limits -- and for good reason.
The sites below are among the most fascinating on earth -- from the vault containing the highly coveted, secret formula for Coca-Cola to an island inhabited by thousands of snakes. Some are temporarily closed off from the public while others will remain so permanently, meaning exploration will have to be conducted via imagination.
Located nine miles west of Harrogate in North Yorkshire, this Royal Air Force Station (RAF) covers about one square mile of moorland, or open area typically covered with grass. Run by the US National Security Agency (NSA), it is thought to be the largest electronic monitoring station in the world. Its distinctive golf ball structures, formally known as radomes, are believed to secretly monitor and possibly even intercept communications.
Controversy remains, especially among activists who are unsure whether the secret activities conducted within the base are acceptable, or accountable, to the British public.