I've traveled to all 50 US states. Here are 8 of the most unique places I've visited.

After traveling to all 50 US states and nearly every national park, I've come across some truly unique locations.Emily Hart

• I've traveled solo to all 50 states and nearly every US national park.
• Throughout my travels, I've come across many unique natural and man-made locations.

After traveling solo to all 50 states and nearly every US national park, it's rare that I find a place that still surprises me or feels genuinely unique. But when I do find a place that leaves me awestruck, I never forget it.

These unique places are unlike anywhere else, either naturally or due to human influence.

Although uniqueness is somewhat subjective, here are eight places I've found to be unforgettable and one of a kind.