In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

Designed as a reminder of one of the darkest moments in Austrian history.

Museum devoted to the artificial language of Esperanto.

Handsomely crafted representations of our round planet.

Baroque celebration of the end of the Great Plague of Vienna.

Former abode of notable poet, complete with literary references and stories of ghosts.

The historic home of an educator, abolitionist, activist, and poet.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

The first museum in the U.S. to address human rights issues in China.

A brass and marble scale model of the solar system embedded in the concrete.

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

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

This grand gothic brewery has been pumping out suds for over a hundred years.

A free display of artistic lifesize dinosaur sculptures in a backyard garden.

A beautiful Gilded Age hotel in the White Mountains with surprising diplomatic history.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

The place where Samuel "Slater the Traitor" brought the Industrial Revolution to America.

Museum dedicated to awful artwork.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

This location holds the truth to what truly happened that faithful night.

The site of the Andover Witch Hunts, which ended with more witch accusations and arrests than Salem.