Canada's oldest railway tunnel is illuminated in a rainbow of color as it passes under the streets of this small city.

This natural marble cave is one of only five national monuments in Oregon.

The Andean town where every single building is decorated with a brightly colored frieze.

One of the most acclaimed eateries in Arkansas is a two-table diner on the ground floor of a family home.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

One of the world’s largest collections of paper memorabilia chronicles 4,000 years of papermaking.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

A lavender labyrinth so large it’s visible on Google Earth.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.