Answer: I think the answer is Riverbed. Let me know if I'm right or not.
Do u mean theravada and mahayana? because theravada is basically the “originall” buddhism
The answer is Machu Picchu.
One of the most important cities of the Inca Empire was Machu Picchu. The reason why it is usually known as the "lost city" is because this city was not discovered by the Spanish when in the 1500s they conquered the Inca territory. Machu picchu is one of the New Seven Wonders of the World nowadays.