The Grand Palace

The Grand Palace (Phra Borom Maharatchawang) is a former royal residence established in 1782 after King Rama I ascended to the throne. Today, it's only used on ceremonial occasions, but it remains the city's biggest tourist attraction and a pilgrimage destination for devout Buddhists.

Visitors can survey the Grand Palace grounds and four remaining palace buildings, which are interesting for their royal bombast. 
Give yourself between two-to-three hours to explore the sight completely, or an hour longer if you take a guided tour.

As with many of Bangkok's sights, you will need culturally appropriate attire to enter the Grand Palace. Visitors should wear long skirts/trousers and sleeved shirts—anything that covers more than the lower arms and head.

Sleeveless shirts, vests, and short or see-through tops are prohibited, as are shorts and three-quarter length pants/skirts. In addition, visitors won't be able to enter if they wear torn or skinny trousers, cycling shorts, or miniskirts. There are no restrictions on what footwear you wear in the palace, but do note that you will be asked to remove your shoes to enter some buildings.