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

A gigantic collection of teeny, tiny books.

Unusual building appears to be haphazardly built from randomly piled bricks.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

A chilling monument to Korean patriots who resisted the Japanese occupation.

This cave holds a surprisingly colorful variety of geological oddities.

World's second largest particle accelerator, where nature reveals its secrets.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

More than 5,000 contemporary and "historic" mustards from around the world.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

An unassuming store hides relics of its former life as the jazz club that hosted some of the best black performers of the 1920s and '30s.