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Sharks have patrolled the seas for more than 420 million years, and as apex predators, they help keep marine ecosystems in balance. The tiny explorer in today's image—a lemon shark pup weaving through a mangrove forest in Eleuthera, the Bahamas—offers a perfect reminder that their stories don't begin with drama but with nurseries and survival. Lemon sharks give birth to live young, and their pups spend years in shallow mangroves, where calm, sheltered waters provide a safe place to grow. As adults, they can reach about 3.4 metres in length and females often return to the same nursery sites to breed. Hunting mainly at night, they use specialised electroreceptors to detect prey hidden beneath sand or in murky water. They also benefit from living in groups, which can improve communication, courtship, hunting success and protection. Yet lemon sharks are considered near threatened, and sharks worldwide face growing pressure from overfishing, fear-driven killing and habitat loss.

Some places are best introduced with one word: Yoho. It is a Cree expression of wonder, which is exactly the reaction most people have. Established in 1886, Yoho National Park protects part of the Canadian Rockies in British Columbia. Visitors can stop at Takakkaw Falls, where water plunges more than 370 metres, or explore the world-famous Burgess Shale fossil sites. These rocks preserve the remains of marine animals that lived more than 500 million years ago.

Then there's Emerald Lake, featured in today's image. Surrounded by mountain peaks and forests, it is the largest lake in Yoho National Park. Its vivid green colour comes from glacial sediment that enters the lake each year with meltwater. As the seasons change, so does the landscape. In summer, meadows and roadsides fill with wildflowers, making one of the park's most iconic views even more colourful. One final note: leave the flowers for the next visitor and keep your distance from wildlife. Bears have a strict no-selfie policy.

Some monasteries begin with a grand plan. Llanthony Priory, however, owes its origin to a knight who lost his way. Nestled in the Vale of Ewyas beneath the Black Mountains, the priory is a 900-year-old Augustinian ruin. History has it that a Norman knight, William de Lacy, stumbled upon a ruined chapel dedicated to St David while hunting. Captivated by the solitude, he abandoned his military life to become a hermit, leading to the foundation of the monastery around 1100.

The site became home to Wales's first community of Canons Regular. Known as the 'Black Canons' for their dark robes, these monks preached among local communities rather than remaining behind monastery walls. The priory endured civil wars, raids and the uprising of Owain Glyndŵr, which forced the monks to flee. A daughter house established in Gloucester eventually became wealthier than the original Welsh foundation.

Today, visitors can explore the ruins, hike nearby trails and even stay overnight at the Abbey Hotel, where history isn't just preserved—it's room service.

Sunlight cuts through drifting clouds and settles on the terraced slopes of Sapa, where rice fields cascade down the mountainsides like a living staircase. Located in Vietnam's Lào Cai province, this highland region is shaped as much by human hands as by nature. Generations of farmers from local ethnic communities such as the Hmong have carved and maintained these terraces for centuries, guiding water across steep hillsides to sustain each growing season.

Each level holds a thin layer of water that reflects the sky, nourishing young rice plants before the fields shift from vivid green to warm gold at harvest. Mist moves through the valleys, revealing new layers of hills and winding paths, creating a sense of constant change beneath Fansipan, Indochina's highest peak. Though remote, Sapa has become an increasingly popular destination, drawing visitors who come for the striking scenery and leave with a deeper appreciation for a place still shaped by tradition.

Set in Guatemala's western highlands, Lake Atitlán fills a vast volcanic caldera. Its deep blue waters are framed by steep crater walls and the cone-shaped volcanoes Atitlán, Tolimán and San Pedro. Wooden piers stretch into the still lake, emphasising the contrast between its calm surface and the rugged terrain shaped by volcanic activity.

Formed about 84,000 years ago after a massive eruption, the lake is often considered the deepest in Central America, reaching depths of roughly 335 metres. Steep escarpments encircle the basin, enclosing the water in a dramatic natural amphitheatre that echoes its explosive origins.

Beneath the surface lie traces of submerged Maya sites more than 1,500 years old, including remnants of ceremonial structures that hint at a once-thriving lakeside culture. Along the shore, Kaqchikel and Tz'utujil Maya communities continue to preserve their languages and weaving traditions, their daily lives still closely tied to the rhythms of this highland landscape.

A bill like a multitool and plumage full of colour—the plate-billed mountain toucan is one of the Andes' most distinctive birds. It lives in the humid mountain forests of Ecuador and southwestern Colombia, perfectly adapted to life high in the canopy.

This toucan relies heavily on fruit, feeding on berries, figs and other forest produce. Using its strong, versatile bill, it reaches and processes food with ease. It often moves deliberately through the canopy in pairs or small groups, navigating dense foliage with surprising agility. As it feeds, it also disperses seeds, making it an important contributor to forest regeneration.

Perched here among orchids, the bird offers a glimpse into its lush habitat and the delicate balance it helps sustain. But beyond its striking colours lies a challenge: the species is considered near threatened as habitat loss continues to reshape the Andean cloud forests.