Sicao Green Tunnel in Tainan, Taiwan, offers a unique ecological experience, often dubbed Taiwan's "mini Amazon." Access is primarily via an organized boat tour through a natural tunnel formed by mangroves, which is the main attraction; while walking around the visitor center is possible, the highlight requires a guided boat. It's generally accessible via public transport (bus) or taxi from Tainan city, with the boat boarding process being straightforward. There are no strict seasonal restrictions, though spring and autumn offer the most pleasant weather, avoiding the heat and potential typhoons of summer; the green tunnel itself is beautiful year-round. A boat ticket typically costs around 150-200 NTD, and the entire visit, including waiting and the boat ride, usually lasts about 1 to 1.5 hours. It's a popular spot for photography, so consider visiting on weekdays or early mornings to avoid crowds. Don't forget insect repellent, especially during warmer months.