Race through the maze, get your name on the sign.

America's only nuclear missile silo open to the public.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A whale of a public art display towers atop Juneau's cruise ship dock.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The king of U.S. high points towers over every other peak on the continent.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

One man's quest for the ultimate road trip vehicle.

The largest outdoor art gallery in the Northwest United States.

The Swedish flag over this small naval fort signals that the nation is at peace.

It houses the remains of a 17th-century version of the Titanic.

A small island dotted with old, historic Finnish buildings.

A subterranean house of worship carved right out of the bedrock.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Copenhagen's celebrated theme park and gardens.

The cardinal directions, set in stone.