The protesters claim the arrest and charge of Istanbul's mayor is politically motivated and undermines Turkey's democracy.

as it makes stops near must-visit sights like Galata Tower, Istanbul Modern and the Hagia Sophia. One-time rides on any tram line will set you back about 15 Turkish lira (approximately 55 cents).

CNN explores the magic of Istanbul after the sun sets, where ancient streets come alive with a vibrant symphony of sounds and sights, from bustling rooftop bars to intimate jazz clubs.

The Basilica Cistern is Istanbul's largest surviving Byzantine ... makes it easy to explore before or after visiting nearby sights like the Hagia Sophia, the Blue Mosque and the Topkapi Palace ...