1. Vancouver Island, Canada
Which whales? Orca, grey, humpback, minkeWhy it's a hotspot: Some 20,000 grey whales pass the island’s Pacific coast in spring; it also has resident orca – the most researched pods in the world
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Orca whale breaching in Canada
Other wildlife? Salmon, sea otter, seal, sea lion, bald eagle
Best for... Close-ups with orca in Johnstone Strait; spotting migrating greys, then attending the Pacific Rim Whale Festival (March)
When to go? March-April (grey); May-September (orca)
2. Québec, Canada
Which whales? Blue, humpback, fin, minke, belugaWhy it's a hotspot: Three currents collide near Tadoussac in the Gulf of St Lawrence’s mouth, stimulating plankton development and providing a veritable feast for whales
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Fin whales, St Lawrence River
Other wildlife? Seal, porpoise, dolphin, snow goose (Mar-May & Oct)
Best for... Spotting bright-white beluga – Saguenay Fjord is home to a resident population of these ‘sea canaries’
When to go? Best June-Sept
3. Iceland
Which whales? Minke, humpback, blue, sperm, seiWhy it's a hotspot: The North Atlantic is a good feeding ground; whale-watching trips run from the west or north of the country – Húsavik is the main hub, but tours also leave from Reykjavík
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Whale near Husavik, Iceland
Other wildlife? Puffin, porpoise, dolphin
Best for... Whalewatching under the midnight sun (June-July); visiting Húsavik Whale Museum
When to go? Best May-September; June-July (blue); May-August (puffin)
4. Dominica
Which whales? Sperm, humpback, short-finned pilot, false killer, melon head, pygmy spermWhy it's a hotspot: Steep underwater drop-offs along the Nature Isle’s west coast create sheltered bays – ideal places for sperm whales to breed and calve
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A young Humpback whale swims at the surface of the Caribbean Sea
Other wildlife? Dolphin, pelican, turtle
Best for... Shore-based and boat-based sightings of resident sperm whales
When to go? Year-round but best November-March (sperm); January-April (humpback)
5. Baja California, Mexico
Which whales? Grey, blue, fin, Bryde’s, humpback, sperm, minkeWhy it's a hotspot: Greys come to breed in San Ignacio Lagoon, on the Pacific coast; multiple species congregate in the food-rich Sea of Cortez
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Free diver with humpback whales off Mexico's Baja peninsula
Other wildlife? Dolphin, California sea lion, Guadalupe fur seal, northern elephant seal, blue-footed booby, frigatebird
Best for... Eyeballing friendly greys, which bump right up against small boats and love to be hugged
When to go? Best February-April | Practically kissing the humpbacks!
6. Colombia
Which whales? Humpback Why it's a hotspot: Colombia’s Pacific coast is on a humpback migration route; sighting hotspots include Nuqui, Bahía Solano and Bahía Málaga. Combine the whales with a spot of jungle trekking
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Whale in Utría National Park (Flickr: Creative Commons/Luis Alejandro Bernal Romero)
Other wildlife? Turtle, dolphin, sea lion
Best for... Taking boat trips to spot breaching humpbacks and mothers with calves
When to go? Best July-Nov (whales); Jan-July (turtle nesting)
| Two wonderful adventures...
7. Scotland
Which whales? Minke, humpback, fin, sperm, orcaWhy it's a hotspot: A third of the North Atlantic’s whale population migrates via western Scotland every year, while some species are resident year-round
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Whales in Chanonry Point, Fortrose, Scotland (Flickr: Creative Commons/Pete White)
Other wildlife? Dolphin, porpoise, white-tailed eagle, puffin Best for... The possibility of large pods of orca, especially off Shetland; minke sightings off the Hebrides
When to go? Best May-October
8. Azores
Which whales? Sperm, humpback, sei, bearded, blue, short-finned pilot, orca, finWhy it's a hotspot: The remote archipelago sits in nutrient-rich waters; the seas sustain resident whale populations, while the islands are also visited by migrating species
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Sperm whales in the Azores
Other wildlife? Dolphin, turtle, manta ray, petrel, shearwater
Best for... Seeing sperm whales spyhopping; swimming with dolphins; gazing out from vigias (whale observation posts)
When to go? Year-round (sperm); late March-early June (blue, fin, sei)
9. Western Cape, South Africa
Which whales? Southern right, humpback, Bryde’sWhy it's a hotspot: Two oceans converge, resulting in a huge diversity of marine life; sheltered bays and warmer waters provide calving spots for migrating whales
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Whale breach in Hermanus, South Africa
Other wildlife? Great white shark, dolphin, African penguin, Cape fur seal, black oystercatcher
Best for... Shore-based spotting along the Whale Route; Hermanus Whale Festival (2-4 Oct 2015)
When to go? Best July-Nov; May-Dec (humpback)
10. Sri Lanka
Which whales? Blue, sperm, humpback, Bryde’sWhy it's a hotspot: Sri Lanka’s southern tip nudges the depths of the continental shelf, favoured by blues; nowhere else does the world’s biggest creature swim so close to land, so reliably
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Sperm whale in Sri Lanka
Other wildlife? Dolphin, turtle, flying fish
Best for... Cruising out from Dondra Head to spot mighty blues
When to go? Best January-April
11. South Island, New Zealand
Which whales? Sperm, blue, humpback, southern right, orcaWhy it's a hotspot: Tectonic plates collide and ocean currents meet off Kaikoura, attracting an abundance of marine wildlife
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Humpback whale, New Zealand
Other wildlife? Seal, dolphin, albatross, penguin, shearwater
Best for... Sperm whales, which are present here year-round; swimming/snorkelling with huge pods of dolphin and playful seals
When to go? Year-round (sperm); June-July (humpback); December- March (orca)
12. Tonga
Which whales? Sperm, humpbackWhy it's a hotspot: During the austral winter, humpbacks migrate from the South Pole to warmer Polynesian waters to mate and give birth
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Humpback whale, Tonga
Other wildlife? White-tip reef shark, black-tip reef shark
Best for... Spotting humpback mothers with calves – and possibly jumping in to swim with them: this is one of the few places in the world where snorkelling with whales is permitted
When to go? Best July-October