Home to items never before seen by the public.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

"...I guess that was your accomplice in the wood chipper?"

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

This impressive Boston holy house is the American mecca for Christian scientists.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

It would take 35 firetrucks to fill this enormous glacial pothole.

There aren't too many operational funiculars around, but Pittsburgh has two!

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A toxic ghost town sitting atop a massive coal fire.

Former headquarters of the KGB.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Largest lake in Great Britain measured by surface area.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

A historic observatory precariously perched at the "Top of Europe."

The final resting place of the controversial chess champion.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

A sulfuric martian landscape that looks far better than it smells.

Three columns of volcanic rock shoot out of the ocean.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.