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

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

A Spanish artist builds his own castle.

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

A glacial valley filled with silver beech trees in the mountains of Portugal.

A small sanctuary carved into the mountainside near the tallest point in continental Portugal.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

Panoramic views from the mountains over a facility built to provide tuberculosis patients with fresh mountain air.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Explore a remarkable 35-hectare sculpture garden located an hour outside of Lisbon.

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

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

This now abandoned restaurant provides some of the most amazing views of Lisboa.

After the owner of this Art Nouveau home died, it was turned into a museum displaying a lifetime dedicated to art.

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

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

An eerie, protected forest of old-growth oak trees, many of which are now dead.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.