Gulls compete for the airborne material at Toronto's Cherry Beach. Rick Madonik/Toronto Star via Getty Images hide caption

Donald Trump Jr. and Eric Trump, executive vice presidents at the Trump Organization, attend the Trump International Hotel And Tower Vancouver Grand Opening in February. Phillip Chin/Getty Images hide caption

Smoke rises from the Resorts World Manila complex early Friday, June 2, 2017 in Manila, Philippines. Bullit Marquez/AP hide caption

Because a high pH level makes cigars fairly alkaline, consuming tart candies like Skittles or Starbursts can help neutralize the palate. Kristen Hartke for NPR hide caption

The hotel continued to operate after the devastating 2010 earthquake. The collapsed roof is visible behind the pool. Brendan Sweeney/WAMU 88.5 hide caption

Starwood Hotels & Resorts Worldwide has accepted a takeover offer from Marriott International, after Chinese firm Anbang Insurance Group Co. withdrew from takeover talks. Bloomberg via Getty Images hide caption

Gujaratis played a huge role in the expansion of Best Westerns and Days Inns across the country, according to one scholar, partly because they were willing to relocate to places like Berlin, Conn., pictured here. Mike Mozart/Flickr hide caption

Sebastiaan De Vos, right, the general manager of Vienna's Magdas Hotel, recruits refugees like 24-year-old Ehsan Amini, left, to work at the hotel. Amini, who works in the Magdas cafe, fled Afghanistan and arrived in Austria five years ago. He's one of 20 refugees staffing the hotel. Joanna Kakissis for NPR hide caption

Brooke Borel says bedbugs were essentially wiped out after World War II thanks to DDT. It's not totally clear why they came back in the past couple of decades. iStockphoto hide caption

Marriott is putting envelopes like this one in thousands of rooms at its hotels, hoping to boost the number of guests who tip the housekeeping staff. Marriott hide caption

Kelsey Blodget of Oyster.com photographs the lobby of New York's Trump SoHo hotel. The website relies on tech-savvy workers to create online reviews and track hotel bookings. Oyster.com hide caption