With the London Olympics well underway, there's never been a better time to book your trip and get down to currently the most active and exciting city in the world.

British travel-and-everything-else company Virgin listed the best underground transit systems in the world. Amazingly, London's Tube system is at number one!

London travel is often slow, crowded and awfully hot. It can also be extremely pricey. Here's how to save some of that travel budget.