Although the castle has been virtually gutted, it's architecture is beautiful and the grounds surrounding the castle make for a relaxing walk through the Irish countryside and picture taking.

"When in Rome, do as the Romans." That classic advice leads to a wealth of options: Should you follow Augustus and Caesar, whose Rome is filled with spectacular ancient structures?

For a bird's-eye view of London, take a spin on the London Eye, the Ferris wheel overlooking the Thames. Don't miss landmarks like Big Ben, the Tower of London, St. Paul's Cathedral and the Globe Theatre.