Stonehenge
Located near Salisbury, England, this megalithic structure is over 3,000 years old, and its stones come all the way from Wales. Scholars still are not sure how the builders got the stones there and have tried to replicate the feat, with dismal results. Moreover, we only have a vague idea to its purpose (we’re basically just guessing). Stonehenge is now fenced off, and you can no longer go into the circle; visitors can only walk around the attraction. But it’s worth visiting for the mystery behind it and an excellent and detailed audio tour.
The Colosseum and Forum
The Colosseum and the Forum are right next to each other in Rome, so I included them together. Remnants of a civilization that once controlled the known world, these sites are breathtaking not only for their beauty but also for their history and age. You’re standing in the spot Caesar walked and gazing into the arena where gladiators battled to the death. The Colosseum has slowly crumbled throughout the ages, and much of it is restricted now, especially the floor and basement where everything was organized. The Forum is great to walk around (and it’s free), though a ticket is required for Palatine Hill. I would definitely get a guided tour, because the information presented by the authorities doesn’t go into much depth.