Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Thousands of well-dressed mummies below a monastery.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

This Elizabethan hedge maze is one of only six in North America.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A swing to dangle you off the very edge.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A whimsical village of unique treehouses resides in a Washington forest.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Canyon walls shrouded in ferns.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

The "Seinfeld" diner.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This lab's maddening silence is good for business but bad for sanity.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

The longest hedge maze in the world.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

A fiery crater has been burning in the Karakum Desert since 1971.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Experience park where visitors are told to expect the unexpected.