Stonehenge is probably the best-known monument from the Neolithic period, but even though we’ve been studying the stone circle for centuries, nobody has conclusively solved the mystery of why it was built. The site lies two hours away from London, in beautiful Wiltshire, and is the ideal location for a day trip from the bustling capital city. A large range of providers offer tickets and tours including transportation, but you should book in advance to secure your place.