Float above coral gardens without getting wet: this glass-bottom semi-submarine tour from San Andrés lets visitors of all ages see reef life up close. In 2–3 hours you’ll pass spurs, turtles and shoals while learning about the island’s geology and Raizal culture.
More ways to explore the area's outdoor wonders
The deck rocks gently underfoot as the boat slips away from San Andrés town and the Caribbean flattens to a sheet of scattered aquamarine. Below, the glass-bottomed semi-submarine waits like an inverted window: coral gardens, finger-like spurs and the slow choreography of parrotfish and rays pass beneath, framed by shafts of sunlight that dare the deep to glitter.
Difficulty
easy
Duration
2–3 hours
Fitness Level
Minimal fitness required; participants should be able to walk down a few steps and stand for the cabin view.
Wildlife
History
San Andrés has a mixed Raizal heritage with English Creole roots and Colombian governance; its reefs have long sustained local fishing communities.
Conservation
Coral reefs here are sensitive to warming and pollution; choose operators that follow no-touch rules and support reef-safe practices.
Reserve your spot on the San Andres Underwater Tour with Glass Bottom today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Book morning departures
Mid-morning light improves underwater visibility and calmer sea conditions; aim for first or second departures.
Use reef-safe sunscreen
Oils and chemicals harm coral—choose reef-safe formulas and apply before boarding to reduce runoff.
Bring motion-sickness remedies
The ride over channels can be choppy; if you’re prone to seasickness, take medication or use acupressure bands.
Protect your camera
Salt spray and humidity can damage equipment—use a dry bag and lens cloth for quick cleaning between shots.
Reef-safe sunscreen
Protects skin and the coral ecosystem while allowing you to stay comfortable in tropical sun.
Wide-angle compact camera or phone with polarizer
Helps capture the expanse of reefs through wet glass and reduces surface glare.
Light windbreaker
Useful for cooler breezes on open water crossings, especially in the morning or late afternoon.
Motion-sickness bands or medication
Prevents nausea on choppy crossings so you can enjoy the underwater viewing cabin.