Felix Romuliana, a UNESCO World Heritage site near Gamzigrad, Serbia, is an impressive ancient Roman imperial palace and memorial complex best accessed by car or taxi from nearby Zaječar, offering good on-site signage for solo exploration. While informative on your own, a guide can greatly enhance understanding of its rich history. The site is generally open year-round, with spring and autumn providing the most pleasant weather for a visit, as summers are hot and winters cold. Expect a low to moderate entry fee for a typical visit duration of 2-3 hours. Visitors should wear comfortable shoes for walking on uneven terrain and bring water, especially during warmer months, to fully appreciate its remarkable mosaics, fortifications, and well-preserved ruins, including an on-site museum.