Home to some of the oldest hominid fossils ever found.

This Aztec structure remained hidden until the demolition of a supermarket exposed the lost temple.

Burial site of the world's most widely known researcher on the endangered mountain gorilla.

An obelisk marks the spot where a British explorer's heart was buried before the rest of his body was transported to England.

Artifacts showcasing the witchy history of Zambia.

These naturally balancing rocks were pictured on every Zimbabwean banknote, up to the 100 trillion-dollar note.

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

A large-scale steel sculpture entitled 'The Shadow Boxer' pays tribute to Nelson Mandela.

A growing popular hipster market with over 100 local specialties and live music.

One of the tallest buildings in Africa provides a great view of Johannesburg's unique geography.

A barbarous band of serpents guard the bases of these Aztec temples.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

Sofia's legislative center is continuously reinventing itself.

"Holy Wisdom" overlooks the city that became its namesake.

"Unity, Creativity, Beauty."

Eastern Bloc nostalgia, anybody?

A striking symbol of the Bulgarian capital.

A collection of art from Bulgaria's time as a communist state.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

This enormous abstract sculpture is part jungle gym, part elaborate noise-making machine.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.