Activity #1: Blue Lagoon - iconic geothermal spa, fully accessible including into water (specialized wheelchair and staff assistance), warm milky-blue waters rich in minerals, silica mud masks, swim-up bar, café and restaurant on-site, advance booking essential, allow 2-3 hours, deeply relaxing
Activity #2: Golden Circle tour - classic Iceland day trip: Thingvellir National Park (tectonic plate rift, accessible viewing platforms), Geysir geothermal area (Strokkur erupts every 5-10 minutes, accessible viewing), Gullfoss waterfall (accessible upper viewing platforms), can be done via accessible tour or self-drive, full day activity
Activity #3: Reykjavik city exploration - compact and walkable downtown, Hallgrímskirkja church (elevator to tower for views), Harpa Concert Hall (accessible, striking architecture), Old Harbor area, accessible restaurants and cafes, quirky shops, street art, very manageable size
Activity #4: Northern Lights viewing (September-March) - accessible tours available with heated buses, can often see from hotel or city in clear weather, patient activity (weather dependent), some hotels have Northern Lights wake-up call, magical experience, also accessible from Blue Lagoon
Activity #5: Jökulsárlón Glacier Lagoon - stunning glacial lake with floating icebergs, accessible viewing platform, Diamond Beach nearby (ice chunks on black sand), about 5 hours drive from Reykjavik, full-day trip or overnight on South Coast, boat tours available (accessibility varies), unforgettable scenery
Activity #6: South Coast waterfalls - Seljalandsfoss (can walk behind, but not wheelchair accessible), Skógafoss (viewing accessible but climb to top not), dramatic scenery, accessible viewing areas for all major falls, combine with Glacier Lagoon for full South Coast tour, day trip from Reykjavik