1. The Sundarbans (West Bengal)
The world's largest mangrove forest and only tidal delta where land breathes with the tide. This UNESCO site isn't about luxury resorts—it's raw, humbling wilderness. Cruise through silent creeks at dawn, spot Irrawaddy dolphins, walk canopy bridges above tangled roots, and feel the presence of the Royal Bengal tiger (even if unseen). What makes it special: you travel by boat through 400+ waterways with no roads—just mangroves, mudflats, and resilient villages living alongside tigers. Best visited Nov–Feb. Pro tip: Book through operators who employ local guides and contribute to conservation—your tour fee directly funds anti-poaching patrols and mangrove restoration.