Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

Enormous lake at the bottom of a unique cave system.

This bridge is haunted by the ghost of a distraught mother.

Mile-long cave system near Great Smoky Mountains.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.