This castle is the pride of the Czech Republic’s capital. Prague Castle has been at the center of the country’s history for the longest time, and continues to be a symbol of its struggles. The castle, which is known as one of the largest in the world, was built in the ninth century and stands majestic till today. You can take a guided tour of the Prague Castle every day from 9 a.m. to 5 p.m. Tours are offered in six languages: Czech, English, German, Italian, Russian, and Spanish.