Believe it or not, the now-ubiquitous California avocado originated in Guatemala.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

The historic home still shows the scars from a little run-in with the British in 1813.

This tree was extinct for a thousand years before sprouting again from a 2,000-year-old seed.

A big museum full of little worlds.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

One of the world’s most colorful cemeteries, where each pigment is symbolic.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

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

Home to what locals claim is the largest whale skeleton in Southeast Asia, which is worshiped yearly.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

A working model of a pressure-driven, high-speed rail whizzes around a private vineyard.

Some cheeky plantings brighten an old slipway on Scotland's Firth of Forth.

A derelict bit of transportation infrastructure hidden in the woods.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

An alternate history park where the Union Army loses the war... to dinosaurs.

CDMX's home for the world's culinary delights.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

Granny Smiths and Fujis can both be traced back to Kazakhstan, where apples still grow wild.

The pits used to load the nuclear bombs onto the aircraft that dropped them over Hiroshima and Nagasaki at the end of World War II.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

This rare collection of human deformities displays fetuses with two faces, one eye, and "mermaid" legs.