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

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

An ancient octagonal weather station named for the eight Greek gods of wind.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

A Byzantine-era church hidden in a wooded area below the Acropolis.

According to legend, this ancient column contains healing properties.

A medieval military street hidden beneath a charming French fishing village.

The construction of a tram line unveiled hidden remnants of the old medieval city.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

A French library that makes sure its love of books is writ large... giant in fact.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

Medieval Danse Macabre Fresco in Northern Brittany.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.