For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

This little-known, 35,000-specimen collection in Greece is a lepidopterist's dream.

The rocky remains of an ancient Greek forest.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

Learn about the sweet, storied legacy of beekeeping in ancient Greece.

A little-known park with unusual, half-ruined structures and a mystical energy.

Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

Cave on extinct volcano, once home to famous mathematician Pythagoras.

Ancient Greek oracle of the dead.

Hideout of thieves, monks, and goat-footed gods.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

The ruined doorway is a portal to the building's turbulent and torturous past.

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