This stunning gothic ruin was a casualty of the Indiana steel industry crash.

This secluded walking trail is a hidden gem of a Pittsburgh park.

A colorful square marks the heart of the city's LGBTQ community.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

This antique thermometer honors the creator of the first universal temperature scale.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

Launch site for nuclear war against Western Europe.

The library's graceful rotunda is like a bibliophile's temple.

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

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

An underground magnet for ever-changing street art.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A favorite with sightseers and locals alike, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.