One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Proceeds from this colorful teahouse in a historic Atlanta neighborhood directly fund women’s education in northeast India.

This wondrous hideaway is suspended in a bamboo forest above a sanctuary for rescued llamas and alpacas.

Scattered around Atlanta are little doors with big charm.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.

On land once deemed “valueless,” a multipurpose community garden proves the potential of urban farming.

A white oak with property rights.

Rare and classic books by Black authors are the focus at this independent bookstore in a historic Atlanta neighborhood.

This "living building" on Georgia Tech's campus is home to a blueberry orchard, honeybees, and more than 900 solar panels.

No passport is required to eat around the world at this elegant restaurant.

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

These ancient ruins hide in plain sight next to a dessert shop.

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.

Large collection from the 3rd millennium BCE.

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

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.

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

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

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

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

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.