United States
Slot canyons so narrow you turn sideways to pass through walls of swirled sandstone.
The slot walls close until your shoulders brush sandstone on both sides and the sky shrinks to a ribbon framed in rust, peach and bone. Out here the map still has honest blank patches, and the canyons keep their secrets until you are inside them.
Grand Staircase-Escalante sprawls across nearly 1.9 million acres of cliffs, canyons, plateaus and badlands, among the last corners of the contiguous United States ever to be mapped, and it still behaves that way: a handful of maintained trails, then open country navigated on your own reading of the land. The slots of the Escalante drainages narrow to sideways-shuffle width, swirled rock closing overhead, magnificent in dry weather and lethal in flash flood, which is the desert's standing condition of entry. Dinosaur trackways surface in the stone of the monument's fringes, and the two tiny towns along Highway 12, Boulder and Escalante, serve as resupply, front porch and social centre for everyone out walking the blank patches.
Solo
Cross-country navigation with map and judgement is the monument's native language, and competence here buys a solitude the famous parks lost decades ago.
Friends
String slot canyons into a shared multi-day, watch the weather like it matters, and end at the farm table in Boulder telling it all back.
Dinner at the celebrated farm restaurant in tiny Boulder, whose fields sit beside the dining room on Highway 12.
Burgers, pie and route advice at the Escalante cafés that double as the canyon country's social centre.

Samaria Gorge
Greece
Sixteen kilometres of vertical canyon walls narrow to four metres at the Iron Gates.

Matthews Range
Kenya
Wild elephants roam cedar forests on a remote mountain range patrolled by Samburu warriors.

Udzungwa Mountains National Park
Tanzania
Primates unknown to science until 1979 live in these Eastern Arc forests.

Wadi Bani Awf
Oman
A rough 4WD road threads villages, canyon walls and the mouth of Snake Gorge.

Channel Islands
United States
Five islands, no shops, no hotels, and cat-sized foxes found nowhere else on Earth.

Boundary Waters
United States
Eleven hundred lakes joined by portage trails where paddles rule and wolves still howl.

Kodiak Island
United States
The world's largest brown bears fish salmon streams on America's second-largest island.

Katmai National Park
United States
Brown bears shoulder-deep in the rapids, snatching leaping salmon straight out of the air.