The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A constellation of golden cobblestones shows the names of local children born under a full moon.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

In Egypt's expanding metro area, many of the neighbors are dead.

Slum Settlement Filled With Mountains of Garbage.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

An endless sea of white conical domes.

One of the most well-preserved temples of ancient Egypt.

A massive work of modern art that appears to be a crop circle in the middle of the desert.

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

The celebrated eyesore created by starry-eyed sweethearts.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

This bridge was constructed from the rubble of the infamous Bastille.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.