The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

An 11th-century fortress home to one of the most influential royal houses in medieval Europe.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Time has stopped at the house where Gandhi died.

Japan's largest collection of Western-style mansions in the port city of Kobe includes a recreation of Sherlock Holmes' 221B Baker Street quarters.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

A symbol of the Workers' Party of North Korea.

One of the last Jazz Age "Wonder Theaters" in New York City.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

Ethiopian standing stones featuring remarkably preserved carvings of swords and people.

This traditional garden in the San Fernando Valley doubled for Star Fleet Academy, and is irrigated entirely by wastewater.

Masterful ceramic fountain and map of the Pacific Basin.

Marvel at the excessive luxury of the ousted Ukrainian president's former estate.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

The ancestral home of beloved English poet Lord Byron has a bizarre history.

A century-long search for a church that was never there.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

The site of the first battle of World War II.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

The Forest Service's surprisingly sophisticated collection of wildfire prevention art features America's most beloved bear.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

A narrow ghost town built onto a peninsula behind a Colombian Slum.