Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

An abandoned desert hamlet swallowed up by sand.

Incredible rock formations jut from the southern end of this spectacular stingray-viewing spot.

One man's hand-sculpted collection of colorful masks representing a host of gruesome spirits.

A mysterious set of tunnels carved in the hills of rural northern Kyushu.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

Sitting atop a rock on Michamvi Pingwe beach, this restaurant becomes its own island at high tide.

This mesmerizing, colorful structure looks like a tent made from stained glass.

This mysterious and unique painting is filled with symbolism.

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

Exquisite carvings of leaves, Green Men, and the occasional dragon adorn a medieval chapter house.

Singapore's last surviving traditional village is hidden among giant skyscrapers and modern infrastructure.

This unique preservation is one of the only taxidermies in the world made with real whale skin.

A carved bench marks the Scottish cave that inspired the classic adventure novel "Treasure Island."

Thousand-year-old trees tower within one of the world's only inland temperate rainforests.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.

This beautiful grotto is one of those places where you can't believe you're just outside Austin.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

Under the desolate and windswept northern coast of Barbados stands a small oasis filled with sea anemones.

This unusual lava tube spouts seawater during high surf.