Perhaps the most spectacular grotto along the Algarve coastline.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Houses are tucked between, on, and underneath giant boulders.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Abandoned railway line circling the city of Paris.

The cave where Saint Genadio meditated and played chess.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Week-long block party becomes a competition for the best decorated street.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

God's Saharan sandbox of wrath.

Crumbling necropolis set high above Fez.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The true depths of these stunning Moroccan caves are unknown.

Along the most northwestern point in Africa is an ancient cave surrounded by legends.

One of the most spectacular canyons in the world.

The remains of a magnificent medieval fortress that was the capital of a vast empire.

Morocco's Argania trees are infested with nut-hungry goats.

Religious dwelling in a Spanish volcano.