为来访者生成一个精美的路线图，以探索给定城市的顶级景点。
城市：马德里
时间：4天
Day 1:
1. Royal Palace of Madrid
2. Puerta del Sol
3. Plaza Mayor
4. Mercado de San Miguel
5. Prado Museum

Day 2:
1. Retiro Park
2. Crystal Palace
3. Reina Sofia Museum
4. CaixaForum Madrid
5. Las Ventas Bullring

Day 3:
1. Temple of Debod
2. Gran Vía
3. Thyssen-Bornemisza National Museum
4. Cibeles Palace
5. Circulo de Bellas Artes

Day 4:
1. Almudena Cathedral
2. El Rastro Market
3. Santiago Bernabéu Stadium
4. Callao City Lights
5. San Miguel Basilica