The oldest floral clock in the world still functions today.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

An important Mayan religious and trading center dating back to 200 BC.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

This massive redwood tree has a drive-thru tunnel carved out of its trunk.

Prank chair from an 18th-century Danish royal court shows the eternal popularity of fart jokes.

Commemorating Frankfurt's Jewish community and 11,908 victims of the Holocaust.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

The last remnants of a lakeside airport that was bulldozed overnight by the mayor of Chicago.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

A place to eat for on-the-run agents and espionage enthusiasts.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

Statue dedicated to the star of an old television show.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

Legend has it fairies gathered at the site of this medieval castle.

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

This huge metal monument is slowly being stripped to its concrete skeleton.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.