Scuba dive the Blue Hole Natural Monument

Plunge into this deep blue hole to see majestic old stalactites (calcium deposits that look like icicles) and coral fringe. The Great Blue Hole was designated a UNESCO World Heritage Site in 1996, along with six other places surrounding Belize's barrier reef, and it remains one of the world's most renowned scuba diving destinations. This blue channel, formed roughly 10,000 years ago when a cave roof collapsed, comprises underwater tunnels, caves, and rock formations.

You'll most likely see marine life along the coral wall at the hole's surface. You'll find the stalactites around 410 feet below sea level, but you're unlikely to see many aquatic critters (save the occasional shark!). Even if you're not a diver, previous visitors suggested snorkeling around the hole and the surrounding reefs. Visit during the dry season, with the best weather most likely in April and May.

The Great Blue Hole is located around 43 miles off the coast of Belize, near the Lighthouse Reef Atoll. There are several diving companies that provide trips to the Great Blue Hole from Belize City, San Pedro, and Caye Caulker. Be prepared to spend an additional $40 in addition to operator costs to dive and snorkel in the Great Blue Hole.