A rare view of a preserved Victorian science museum.

A toxic ghost town sitting atop a massive coal fire.

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

World's first "penitentiary," meant to be humane, drove men insane.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A terrific purveyor of natural history objects and curios.

Few other hotels can rival the grandeur of the Castle in the Rockies.

Cathedral carved out of salt, located a mile below the earth's surface.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

If you've ever wanted to tear Hello Kitty apart with your teeth, this is the place.

This stunning concert hall has become a symbol of Iceland's national recovery.

Iceland: home to volcanoes, waterfalls and, apparently, Santa?

Theme park featuring miniature replicas of European monuments.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Climb inside an iron crystal magnified 165 billion times its normal size.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

An intricate and amazing house built by architect Karl Junker.

The "Prussian Versailles" that is as glorious today as when it was built.

Mysterious 500-year-old tapestries depict a unicorn hunt.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.