Once-a-Year Earth · Trailwind

Migrations, blooms, and light shows Earth only puts on once a yearOnce-a-Year Earth is a hand-picked Trailwind collection of 14 places: Migrations, blooms, and light shows Earth only puts on once a year. Every entry has its own guide with the best time to go, what's nearby and how to build a trip around it.

New England Fall Foliage, Late September to late October 2026

Japan Cherry Blossoms, Late March to early April 2027

Dutch Tulip Fields, Mid-March to mid-May 2027

Namaqualand Wildflowers, August to September 2026

Great Migration River Crossings, August to October 2026

Serengeti Wildebeest Calving, Late January to February 2027

Monarch Overwintering, Michoacan, January and February 2027

Polar Bears of Churchill, Mid-October to late November 2026

Brown Bears at Brooks Falls, July 2027

Synchronous Fireflies, Smokies, Late May to early June 2027

Great Barrier Reef Coral Spawning, November to December 2026

Salar de Uyuni Mirror Season, December 2026 to April 2027

Yosemite Firefall, Mid-to-late February 2027

Lençóis Maranhenses Lagoons, June to September 2027

Browse every collection, city guide and national park

Trailwind finds the moment a trip is unusually possible: the right season, a cheap fare, your open dates, and rare skies. Browse by calendar:

Cosmic calendar — meteor showers, eclipses and aurora, and the best time to see each

Nature's calendar — wildlife migrations, blooms and seasonal wonders, and when to go

World culture calendar — festivals, celebrations and rituals, and when they happen (Holi, Diwali, Day of the Dead and more)

Browse all city guides, national parks and collections