An underground city of salt.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The modern birthplace of Irish freedom.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

The words of the neighborhood's most famous poets adorn four concrete walls.

60 feet of towering steel balances gracefully.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

On the upper deck of this church-owned parking garage stand eight pillars topped with different Catholic saints.

A dazzling display of lights and crystals.

This small plaza encourages people diagnosed with cancer to never give up hope.

Smoky, also known as "Yorkie Doodle Dandy," was a four-pound hero of World War II.

This garden memorial marks the site where 12-year-old Tamir Rice was fatally shot by the Cleveland Police Department.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

A jukebox headstone marks the grave of the Cleveland disc jockey credited with coining the term “rock 'n' roll."

This steamer is known as "The ship that built Cleveland."

Inside houses a vast collection of military aircraft and missiles spanning the ages.

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

This restaurant proudly displays bread signed by the 39th president.

Rows of 19th-century brick ovens used to process coal into coke form the center of a wooded park.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.