Every president in history is immortalized in bronze in downtown Rapid City.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

This massive roadside mascot was the first version of the giant to illustrate his butt.

Elaborate drama imparts an appreciation for 19th century hardships.

A winged-helmed, sword-brandishing tribute to German Americans.

The lowest point in South Dakota and the source of the Minnesota River.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

A cemetery housing wild west legends in South Dakota.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The seamy, underground secrets of Portland's criminal past.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

The largest earthwork effigy in the world.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

A colorful statue honoring the local salmon in glass and bronze.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Two plaques commemorate the site of Shakespeare's first theatre.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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