Sigiriya, Sri Lanka, came in at No. 1. advertisement. ... Cazorla’s main attraction is a charming old town featuring Yedra Castle, also known as the “Castle of the Four Corners.” ...

Sigiriya, an ancient rock fortress and former royal palace, is one of Sri Lanka's most visited and best-known sights, attracting just more than one million visitors in 2019.

Built in the fifth century, Sri Lanka’s Sigiriya fortress attracted the attention of British archaeologists in the 1800s, who were amazed by its leonine rock art and beautiful frescoes.