This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

This abandoned prison castle has become an imposing gallery of graffiti art.

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

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This iconic science fiction house still looks like something from the future.

The largest and most well-preserved petroglyph site in the Verde Valley.

Steadily reminding Czechia of its past.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Macabre astrological automaton clock dating to the late 1400s.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Baroque celebration of the end of the Great Plague of Vienna.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The final resting place for the remains of 143 Habsburg royalty.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

Commonly referred to as the most photographed Victorian home in the United States.