Bohol's Chocolate Hills are just the beginning — discover why this island has stingless jellyfish, the world's smallest primate, and a 300-year-old church that survived a magnitude 7.2 earthquake.
Travel Editorial
Travel Editor
Bohol is famous for its Chocolate Hills and the tarsier — but this extraordinary island in the Visayas hides far more surprises than most visitors ever discover. From stingless jellyfish you can actually swim through to a colonial church built without cement, these Bohol travel facts will make you want to book a flight immediately.
Everyone knows the Chocolate Hills turn brown and chocolatey during dry season — but here is the trivia that blows minds: nobody has definitively proven how 1,268 nearly perfectly conical hills formed. Multiple theories exist: ancient coral reefs elevated by tectonic activity, limestone dissolved by rainwater (karst), volcanic activity, or — the local legend — giant tears cried by a lovesick giant. Modern geology leans toward a combination of limestone dissolution and tectonic uplift, but the precise mechanism remains scientifically debated.
The Chocolate Hills are so unique that they were proposed for UNESCO World Heritage listing in 1997. While still pending full inscription, they were declared a National Geological Monument in 1988. What most tourists do not realize: the hills span three municipalities — Carmen, Batuan, and Sagbayan — and cover over 50 square kilometers. The commonly photographed viewpoint in Carmen shows just a fraction of the entire field.
The Chocolate Hills — 1,268 conical formations whose geological origin remains a subject of scientific debate
The Philippine tarsier — found primarily in Bohol — is one of the world's smallest primates, weighing just 80-160 grams and fitting comfortably in a human palm. But here is the trivia that surprises everyone: each tarsier eye is LARGER than its brain. Those enormous, fixed eyes cannot move in their sockets — tarsiers compensate by rotating their heads almost 180 degrees in each direction, like tiny owls.
Tarsiers are also the only entirely carnivorous primates on Earth — they eat only live prey: insects, lizards, and even small snakes. Even more remarkable, they communicate in ultrasonic frequencies inaudible to humans. Researchers discovered this only in 2012 using specialized recording equipment. Tarsiers have been talking to each other right in front of tourists for decades with zero human awareness.
Conservation note: tarsiers are critically sensitive to stress and noise. Poorly managed sanctuaries have caused tarsiers to die of stress-induced heart failure. Always choose the Philippine Tarsier Foundation sanctuary in Corella over roadside tarsier stops — it is the only fully ethical operation on the island.
The Philippine tarsier — each eye is larger than its brain, and it communicates in ultrasonic frequencies humans cannot hear
Bohol is home to one of the Philippines most extraordinary and least-known experiences: Balicasag Island's surrounding waters and the Anda area contain marine lakes with Mastigias papua — stingless jellyfish that you can actually swim through without being stung. This phenomenon, more commonly associated with Palau's famous Jellyfish Lake, exists right here in Bohol. Local fishermen have known about it for generations; tourists almost never do.
The Baclayon Church (officially the Church of Our Lady of the Immaculate Conception) was built starting in 1595 using coral stones and egg whites as binding mortar instead of cement. It is the oldest stone church in the Philippines — and one of the oldest in Asia. The egg white mortar reportedly came from thousands of duck and chicken eggs collected from surrounding villages.
In October 2013, a magnitude 7.2 earthquake devastated Bohol, killing 222 people and severely damaging the Baclayon Church. Yet its 400-year-old coral stone walls, held together by egg white mortar, still partially stand today. Restoration is ongoing but the core structure survived what modern concrete buildings could not. The coral stones — each placed by hand over 400 years ago — proved more resilient than expected.
Panglao Island — connected to Bohol's main island by two bridges — is home to Alona Beach, but also holds an extraordinary record: its surrounding waters have been independently surveyed by marine biologists from seven countries, all concluding it contains one of the highest concentrations of mollusc species on Earth. A single dive at Balicasag Island's marine sanctuary can yield sightings of 100+ distinct species.
Alona Beach on Panglao Island — gateway to some of the world's richest marine biodiversity
The 2013 earthquake reshaped Bohol's tourism landscape in unexpected ways. While it damaged heritage sites and infrastructure, the reconstruction process attracted significant investment in sustainable tourism architecture. The new wave of Panglao luxury villas built after 2015 are among the most thoughtfully designed eco-properties in the Philippines — combining seismic resilience with open-air tropical design. In a strange way, the earthquake triggered a tourism renaissance.
Bohol's greatest secret is that its most remarkable attractions — the tarsier, the jellyfish, the ancient church — are completely unlike anything else in Southeast Asia.
Q: Why are there exactly 1,268 Chocolate Hills? The number 1,268 is the officially counted figure, but geologists believe there may be more — some smaller formations are not included in the official count. The counting was done during the UNESCO World Heritage nomination process and has not been fully updated since.
Q: Can you touch tarsiers in Bohol? At reputable sanctuaries like the Philippine Tarsier Foundation in Corella, tarsiers are never touched. They are observed in their natural semi-wild habitat from a respectful distance. Roadside tarsier spots that allow handling should be avoided — stress handling can be fatal to these tiny animals.
Q: When is the best time to visit Bohol? March to May offers the best weather with minimal rainfall. November to February is cooler but has occasional rain. The Chocolate Hills are most photogenic from March to June when the dry season turns them brown — visiting in the rainy season means lush green hills that are beautiful but lack the dramatic 'chocolate' effect.
Q: Is Bohol better than Palawan or Siargao? Bohol is completely different from both. It is the only destination in the Philippines where you can combine colonial heritage, unique geological formations, the world's smallest primate, world-class diving, and luxury villas — all within a single island. It suits travelers who want variety and depth rather than a single defining feature.
Q: What are the must-do activities in Bohol beyond the Chocolate Hills? The Philippine Tarsier Foundation sanctuary (Corella), Balicasag Island diving, Loboc River lunch cruise, Hinagdanan Cave (an underground lake lit by natural skylights), Bilar Man-Made Forest (a cathedral of mahogany), and Panglao's world-class dive sites for thresher sharks and sea turtles.