The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

The Pope’s secret escape route.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The yawning maw of this pagan visage is said to bite off the hands of liars.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

Jesus' footprints and the first catacombs in the world.

Numerous impressive carvings are embedded in the trees lining this street in Marrakech.

The other side is actually green.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

“The oddest pub in South Africa,” inspired by a practical joke.

Largest cave system in Africa.

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