Historic ashram with graffiti art and ruins by the Ganges; a short exploration (generally open ~8:00am–6:00pm; sometimes seasonal closures, check locally).
Best chance to spot deer, elephants and possibly tigers — morning safaris typically start around sunrise; book zone and jeep in advance (park timings vary by season).
Take the Auli ropeway (timings commonly ~8:00am–4:30pm but check seasonal schedule) for sweeping views of Nanda Devi and the ridgeline; perfect for photos.
Long transfer (≈8–10 hours depending on route/traffic) — plan breaks for lunch and tea; arrival in Dehradun will typically be in the evening for onward travel.