Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

The most visited, and possibly most controversial, museum in Germany.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

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

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Turning night into day in Victorian-era Austin to thwart a serial killer.

A hot dog stand where the heads are just as hot as the dogs.

Former bath house turns gastropub.

A European-style bath house in Chicago.

These pretty kitties killed and ate as many as 135 railway workers.

Years of archaeology, just chillin' by the water cooler.

Home to a protest movement, a bombing, and a dramatic change in labor history.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This historic hotel invented the chocolate brownie.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

A layered tribute to the work of mosaicist Isaiah Zagar.

Dr Barnes' $25 billion private collection of art and arboretum.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The first American department store, and home to the largest operating musical instrument in the world.

This elaborate towering structure was once famed for its revolutionary height.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

These curious caverns have been home to mushrooms, gangsters, and disco.