Shutterstock Lonely Planet just announced its list of the 500 best attractions on the planet, and Cambodia's Temples of Angkor took first place.

While most people have heard of Angkor Wat, they don't realize that it's just one temple in a complex of more than 1,000.

The complex is actually a massive 700-year old city, with canals, temples, shrines and tombs spread over 154 square miles, deep in the lush jungles of northern Cambodia.

Take a look at these pictures to see why it topped the list of the world's must-see sites.