According to the Tripadvisor website the top 10 monuments to visit in the world in 2018 are:
1 – Angkor Wat (Siem Reap, Cambodia)
2 – Plaza de España (Sevilla, Spain)
3 – Sheikh Zayed Mosque (Abu Dhabi, UAE)
4 – Saint Peter’s Basilica (Vatican City)
5 – Mosque-Cathedral of Córdoba (Córdoba, Spain)
6 – Taj Mahal (Agra, India)
7 – Duomo (Milan, Italy)
8 – Alcatraz (San Francisco, California)
9 – Golden Gate (San Francisco, California)
10 – Budapest Parlament (Budapest, Hungary)