The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This rusting remnant of the local herring industry is being given a second life.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

A winding, blood-red tunnel of hardened lava navigable by foot.

The most powerful waterfall in all of Europe.

The largest library in Latin America owes its existence to an Old World earthquake and a Napoleonic invasion.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

There’s a hidden military meme engraved on the World War II Memorial.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

After several weeks of radio silence, this abandoned oil tanker washed up on a remote beach in Liberia.

This abandoned prison was so notorious that its name has become a metaphor throughout Albania.

The remains of a German plane still sit in the Norwegian wood where it crashed in 1942.

Inside the world's largest seed bank, WWII botanists elected to starve to death rather than compromise their collection.

Art Nouveau painter Alphonse Mucha spent 18 years creating these monumental paintings of Slavic history and mythology.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.