Located in the middle of public park, this cave built in the early19th century houses an ancient stone sarcophagus.

Just outside the Ohio Supreme Court sits a testament to justice.

This museum in the tower of the oldest church in Gdańsk, is home to centuries-old time-keeping devices and the world's first pulsar clock.

This Communist-era residential block is one of the longest residential building in Europe.

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.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

Iron Age "bog person" preserved for over 2,300 years.

Site of the first radio and telephone broadcasting companies in Copenhagen.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

The modest childhood home where the baseball legend and Yankees star learned to hit from both sides of the plate.

An artist has turned what most people would consider a bathroom nightmare into a work of political art.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

From under the bed of one of the co-founders, this server helped launch the notorious file-sharing website.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

The world's largest maze is a nature park with nearly 200 decision points.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

The world’s largest concentrated solar plant generates as many problems as megawatts.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.