The Tower of London
The Tower of London is almost a thousand years old and is home to the crown jewels. Make sure to plan ahead and get tickets to the Ceremony of the Keys, a 700 year long tradition of locking up the Tower at night. Tickets are free but you’ll need to get them 6-8 weeks in advance. Because the Tower of London is a hot tourist spot, lines are hours long. To avoid the long lines, buy tickets at any Tower Hill tube station. With your tickets in hand you can bypass the line and walk right in.