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
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
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
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
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
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
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
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
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
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
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
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
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