Stonehenge is one of the most famous sightseeing spots — not only in Great Britain but in the entire world. Annually, more than 800,000 tourists come here to see the stone construction that is connected to numerous legends and mysteries. In order to buy an entry ticket, you will have to spend about $31 (€26). No less mysterious is a place in Scotland called Callanish. Plus, you can visit it for free. It has no fences and you can touch the 5,000-year-old stones with your hands.