The Temple of Poseidon at Cape Sounion, a majestic ancient ruin dedicated to the sea god, offers a captivating historical experience, particularly renowned for its breathtaking Aegean sunsets. The site, located atop a cliff, is generally accessible for those with average mobility, though involves uphill walking and uneven terrain directly at the ruins, making it less ideal for wheelchairs or strollers. Visitors can explore independently using information boards, or opt for a guided tour from Athens, which often includes scenic drives along the Athenian Riviera and provides deeper historical context. The temple is open year-round, with spring and autumn offering pleasant weather, though summer sunset visits remain highly popular despite the heat; always verify current opening hours. An approximate entrance fee is around 10-15 EUR, with transportation from Athens ranging from €6-7 by public bus to €30-€70+ for organized tours. A typical visit duration on-site is 1-1.5 hours, extending to a half-day trip when including travel from Athens. Useful insights include bringing sun protection and water, wearing comfortable shoes, and enjoying the on-site cafe with stunning views.