The Alhambra, Granada, Spain
A word to the wise: Don't expect to get inside the Alhambra without booking a ticket online at least one day in advance. But don't let that deter you from taking a trip to see this gorgeous palace and fortress.
Built by monarchs in the 13th and 14th centuries, the Alhambra is a prime example of Moorish architecture from that time period. The complex's many detailed designs and peaceful gardens are matched only by the sweeping views it offers of Granada below.