Mecca, Saudi Arabia

Unless you’re a practicing member of Islam, then there’s absolutely no way that you’ll be able to enter the city of Mecca. Interestingly, Mecca has undergone several huge infrastructure campaigns, and there are numerous interesting buildings and breathtaking architecture to see. One of the most interesting buildings in the area is the largest clock tower in the world. However, since only about 1% of the entire U.S. population practices Islam, it’s safe to assume that most American travelers won’t be allowed to go inside.

The city of Mecca is undoubtedly one of the most important cities in the world. However, booking a one-way ticket using your credit card isn’t possible if you aren’t a Muslim. Interestingly, Muslims around the world turn to face Mecca’s location during prayer. Furthermore, they’re also expected to attempt and travel to the city whenever they can during their lifetime. This expectation consistently makes the city one of the busiest tourist destinations on Earth.