Tracing a path of more than four miles around a frozen lake, this is the longest skate trail in the United States.

New Plymouth, Idaho is the only U-shaped town in the United States.

When ecosystems collide in the arid Southwest.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

This man-made mound monument was built out of soil from all across the Polish empire.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

Warsaw's fantastically preserved gasworks...almost.