Fiji
Stand astride the 180th meridian in rainforest, one foot in today, one in yesterday.
The line crosses the island at Waiyevo, and the marker is a small painted thing swallowed by green. Taveuni is too dense with life to be defined by geometry: waterfalls drop through Bouma's rainforest into volcanic swimming pools, and the strait beyond grows soft coral in colours that look invented.
Fiji's third-largest island is called the Garden Island, and it earns the name. Rainforest covers the volcanic spine, and because mongooses never reached its shores, Taveuni keeps birdlife lost everywhere else in Fiji. In Bouma National Heritage Park the Tavoro river steps down through three waterfalls, each ending in its own natural pool, while the Lavena Coastal Walk follows five kilometres of shoreline to a final cascade. Out in the Somosomo Strait, tidal currents feed the Rainbow Reef, and its most storied dive, the Great White Wall, sinks through white soft coral to fifty metres and can only be attempted on the days the tides allow. The meridian marker itself is a geographic plaything; the whole of Fiji keeps a single date.
Solo
Days of birdwatching walks, waterfall trails and strait diving chain together easily here, and guided farm and forest tours take single travellers without fuss.
Couple
Small eco-lodges sit right above the Somosomo Strait, so couples can alternate soft-coral dive days with an afternoon soaking below the Tavoro falls.
Family
The first Tavoro waterfall is a short walk with a swimming hole at its base, and the Waitavala rock waterslide gives older children a natural four-chute run.
Friends
A group dive trip built around the Great White Wall's tide windows leaves spare days for the coastal walk and the date-line photograph everyone takes.
A walk through Bobby's Farm ends in a garden-to-table vegan lunch, the produce picked as you pass.
Coconut Grove in Matei plates the day's fish with organically grown vegetables and homemade pasta.

Galloway Forest Dark Sky Park
Scotland
Britain's first Dark Sky Park, where the Milky Way spills across the silence like luminous dust.

Rann of Kutch
India
A salt marsh stretching to the horizon that turns blinding white under the full moon.

Katpana Desert
Pakistan
Cold sand dunes ripple beneath snow-capped seven-thousanders — a high-altitude desert that defies logic.

Al Marmoom Desert Conservation Reserve
United Arab Emirates
Flamingos wade through a mirage-like lake in the middle of the Arabian desert.

Yasawa Islands
Fiji
Volcanic spines pierce the Pacific, each island ringed by its own shade of turquoise.

Monuriki
Fiji
The island from Cast Away truly belongs to crested iguanas brought back from the brink.

Waya Island
Fiji
Volcanic daggers erupt from reef shallows: ridgeline at sunrise, coral drop-off by noon.

Nananu-i-Ra
Fiji
Fiji's wind-battered outlier: kitesurfers skip across trade-wind chop while the rest of the islands doze.