This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

It houses the remains of a 17th-century version of the Titanic.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

At 929 pounds and 26 feet tall, this stainless steel fork can only be used by the likes of King Kong.

Swiss vineyards in a UNESCO heritage site.

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

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

One of the largest ochre quarries in the world, hidden in a limestone landscape.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

Explore the 500-year history of silk-making in Lyon at this museum, workshop, and boutique.

This abandoned church in central Lyon is missing its front stairs.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

The world's most elegant power lines.

Ernest Hemingway was the first to sign this colorful wall covered in thousands of celebrity signatures.

An ancient rogue artist community hidden next to one of the world's most glitzy and glamorous cities.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds.