In Oamaru, New Zealand, an underpass was built under a busy road in November 2016 to allow penguins to return to their nests from the ocean without the risk of being hit by cars. 

A 30- to 40-minute day tour run by Blue Penguin Colony (2 Waterfront Rd., Oamaru, New Zealand; phone +64 03 433 1195, www.penguins.co.nz), offered once an hour between 10 a.m. and 4 p.m., takes visitors to the penguins’ nesting site in a converted rock quarry while most of the penguins are away in...

In central London, you can ride on one of four converted traditional narrowboats on the Regents Canal between Camden and Little Venice, enjoying simple commentary. Depart from Brownings Pool at Little Venice, Paddington, or from Camden Lock Market, with its craft, clothing and food shops. Pass part of Regents Park plus 19th-century buildings and bridges.

Tickets are sold on board (card only; no cash) and subject to availability; it’s most busy 11 a.m.-1 p.m. One way (50 mins...

Hundreds of classic vehicles — cars, motorcycles and bicycles — on the Portuguese island of Madeira are gathered annually over two days each May at the Madeira Classic Car Revival. Awards are announced in a number of categories, such as best pre-1945 vehicle and best military vehicle. A classic sports car race follows.

The revival is held at the Praça do Povo on the waterfront in Funchal. Admission is free. For more info and, once announced, the dates in 2018, visit www....