Here are top eco‑luxury resorts in Sri Lanka — each blends high-end comfort with strong conservation, low‑impact design, local sourcing and community programs. I’ve included what makes each one eco‑minded, where it is, who it’s best for, and a short price/booking note. Sources for the key claims are cited after each entry.

1. Jetwing Vil Uyana — Sigiriya / Cultural Triangle

• Why it’s eco: built around a restored 28‑acre man‑made wetland that’s become a wildlife refuge (birds, lorises, crocodiles); passive/vernacular architecture, rainwater harvesting, solar, electric buggies, community programs and on‑site conservation research. Great for wildlife lovers and those visiting Sigiriya/Polonnaruwa.
• Best for: nature, birding, cultural sightseeing.
• Price: luxury (rates vary seasonally; typically high‑end). (jetwinghotels.com)

2. Santani Wellness Resort — near Kandy (hill country)

• Why it’s eco: minimalist, climate‑sensitive architecture that minimizes energy use and often avoids air conditioning through natural ventilation; strong wellness/Ayurveda focus on local healing traditions, and landscape integration on a former tea estate. Ideal for wellness/quiet retreats.
• Best for: spa/Ayurveda, digital detox, mountain views.
• Price: upscale to luxury. (wallpaper.com)

3. Ulagalla by Uga Escapes — Anuradhapura / Cultural Triangle

• Why it’s eco: restored colonial planter’s estate turned low‑impact villa resort with LEED/green building practices at several Uga properties, organic gardens, solar and waste‑water systems, and community engagement programs. Villas set in large private grounds for discreet luxury.
• Best for: families, private villa stays, culture/wildlife loop (Sigiriya nearby).
• Price: luxury villa rates. (ugaescapes.com)

4. Wild Coast Tented Lodge (Resplendent Ceylon) — Yala / southeast coast

• Why it’s eco: tented, low‑impact architecture using bamboo and natural materials; solar power, desalination/recycling systems, on‑site composting; conservation partnerships (leopard research, community funds via Dilmah/charitable foundations). Exceptional for safaris and dramatic coastline.
• Best for: safari/wildlife, couples, photographers.
• Price: luxury (glamping‑style). (archdaily.com)

5. Cape Weligama (Resplendent Ceylon) — Mirissa / southern coast

• Why it’s eco: resort takes a “low footprint” approach across cliffside villas, sources local produce, supports community projects and conservation via the parent company’s initiatives; blends contemporary design with local materials and coastal conservation activities. Good base for whale‑watching and beaches.
• Best for: beaches, family/romance, south‑coast activity base.
• Price: luxury/resort. (vogue.com)

6. Ceylon Tea Trails — Hatton / Nuwara Eliya (tea country)

• Why it’s eco: restored tea planter’s bungalows and a focus on preserving tea‑estate landscapes, locally sourced tea/food, heritage conservation, and low‑impact operations across the estate; excellent for slow‑travel and tea‑culture immersion.
• Best for: tea lovers, hill‑country exploration, luxury with cultural depth.
• Price: high‑end/luxury. (vogue.com)

Other notable eco‑luxury options to consider

• Chena Huts / The Fortress / Amanwella / Anantara Peace Haven Koggala — many high‑end properties now emphasize sustainability measures (local sourcing, energy and water efficiencies, conservation partnerships). Always check each property’s current sustainability page before booking. (See hotel/resort sites and recent travel features for the latest initiatives.) (architecturaldigest.com)

Quick comparison & booking tips

• Best for wildlife/safaris: Wild Coast Tented Lodge (Yala). (tourismsrilanka.org)
• Best for wetland/biodiversity immersion: Jetwing Vil Uyana (Sigiriya). (jetwinghotels.com)
• Best for wellness and low‑energy design: Santani (Kandy hills). (wallpaper.com)
• Best for private villa experience and cultural location: Ulagalla (Anuradhapura area). (ugaescapes.com)
• Best for beach/whale watching plus sustainability programs: Cape Weligama / Resplendent Ceylon collection. (vogue.com)

How to verify eco‑credentials before you book

• Look for up‑to‑date sustainability pages on each hotel’s official site (energy mix, water treatment, waste programs, community projects). (jetwinghotels.com)
• Check recent travel‑media reviews (Vogue, Condé Nast, ArchDaily, National Geographic) for independent coverage of conservation work. (jetwinghotels.com)
• Ask the property directly about on‑site sourcing of food, single‑use plastic policies, community benefit programs, and any conservation partners.

If you’d like, I can:

• Narrow this to a “best for couples/families/wildlife/wellness” short list with current sample rates and available dates (I’ll check availability), or
• Pull the latest sustainability reports or the resort sustainability pages for any 2–3 properties you pick.

Which style of stay do you prefer (wildlife, wellness, beach, cultural villas) and which part of Sri Lanka are you thinking of visiting?