For more than two centuries, the canopy of this venerable tree has been a haven for songbirds and lovers.

Bits of flat terrain surrounded by cliffs make one of the most beautiful landscapes in the Azores.

One of the most well-preserved mammoth specimens in the world.

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

The only ancient site that remains on the south bank of the sacred Ilissos river.

According to legend, this ancient column contains healing properties.

This 11th-century Greek monastery has renowned mosaics and relics of a brutal past.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

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

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

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

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

Legend says this sacred tree was a gift from goddess Athena.

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

This medieval "painted village" is famous for its geometric facades.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Large collection from the 3rd millennium BCE.

A sharp sculpture made of thousands of pieces of jagged glass.

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

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

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.

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