A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A museum dedicated to the history and exploration of both popular music and science fiction.

A walk through the historic city center, under the streets of Seattle.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

A sulfuric martian landscape that looks far better than it smells.

A charmingly eccentric magma chaser presents his complete history of the island's eruptions since 1947, in cinematic form, just for you.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

Cat art as far as the eye can see.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A hugely vast Irish landscape of barren rock that stretches for miles.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Pop culture has helped to keep this iconic British building from being destroyed.

Hear the quietest sound from across the dome.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This landmark cemetery in Boston was created more than 300 years ago.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.