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

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

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

This striking sculpture of Icarus honors Greece's fallen flyers.

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

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

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

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

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

Large collection from the 3rd millennium BCE.

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

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

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.

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

The hallucinogenic center of the ancient world.

This nugget of paradise earned its name for obvious reasons.

Monkeys lounge around at this 13th century temple.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

Modern design and unusual architecture make this mountaintop temple no ordinary Buddhist retreat.

A licentious look into Singapore's past, full of disorderly bric-a-brac and disreputable characters.

A so-called Singapore junk store that is closer to a historical restoration center.

"Would you like your sangria in an IV bag, or straight-up?"