India, Dec. 22 -- From bioluminescence tours to northern lights excursions, nighttime tourism is on the rise-and I understand the allure well.

I fell hard for astrotourism after an alfresco camping trip beneath the stars in the Sahara Desert. I've since traveled the globe to see the world's countless after-dark wonders, including aurora hunts from hot springs in Iceland, stargazing from Chile's remote Atacama Desert, and treks and paddles by moonlight in the Amazon Rainforest. Staying up late has helped me see a fresh side of even the most well-trodden destinations, and my book, "100 Nights of a Lifetime: The World's Ultimate Adventures After Dark," provides a roadmap to help you plan your own nighttime outings, too.

But before you head...