A short but powerful waterfall resides amid Colorado’s Great Sand Dunes.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

The remains of a World War II-era Japanese American internment camp dot a windswept Colorado hill.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

This nearly abandoned town was once a thriving mining community until a series of fires.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The highest bridge in America was built for an almost unnervingly small amount of money.

Where else would a linchpin of post-colonial Native American cuisine anchor the menu but a museum?

Shoreline strewn with the remains of ghostly fallen trees.

Stroll through a wonderland of stupendous moss-covered trees.

A giant Troll lurks under one of Seattle's oldest bridges.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

An ancient neolithic tomb that only sees the sun twice a year.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

A restaurant and observation deck built in a unique broadcasting antenna.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.