A once-fairy tale mansion now stands in a state of disrepair.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

Open-air museum with a large collection of Soviet-era statues.

These traffic lights celebrate the 100 year anniversary of the women's suffrage movement in Lithuania.

An abandoned masterpiece of Soviet Brutalist architecture.

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

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

The most impressive of Basel's three remaining city gates.

Romania's triumphal arch looks out over Bucharest.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A beautiful geyser under environmental threat.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A floating cat sanctuary on an Amsterdam canal.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Eighty million natural history specimens call this gargantuan museum home.