The fully functional, submerged Vanuatu Post Office is definitely one of a kind.

These lesser-known Maltese catacombs date back over 1,700 years.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

Hidden beneath a restaurant, underground tunnels tell the story of Malta’s tragic role in World War II.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

A centuries-old forgotten underworld lies beneath Malta.

This church is named for one of the most dramatic tales in the early Christian church.

A hidden tunnel of bones in one of Malta's oldest churches.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

This massive Maya archaeological site is home to the tallest man-made structure in Belize.

Monkeys inhabit the lush forest surrounding ancient Mayan ruins once considered sacred.

An important Mayan religious and trading center dating back to 200 BC.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

A flower grows on this giant stone that is said be able to control minds.

This historic hiding place, often used by people escaping slavery, is a testament to a heroic struggle for freedom.

The hike to this stunning waterfall on a black sand beach is not for the faint of heart.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

A Caribbean chef recreates his enslaved great-great-grandmother's dishes inside the home she purchased after buying her freedom.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

A colorful square marks the heart of the city's LGBTQ community.