The southernmost outpost of the Russian Empire in colonial America.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

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

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

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

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

Unconventional site where the tracks of Zurich tramcars intersect.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

The first modernist church in Europe.

The solemn exterior conceals an opulent interior of this 17th century church.

The Habsburgs' royal collections of art and wonders.

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.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

The ill-fated plan to reroute the Mississippi so that Union ships could bypass Confederate fortifications on the river bend.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

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

A historic presidential getaway on the continental United States' southernmost island.

This state park was once an important Native American cermonial center.

The island residents are known for taking their quirky sense of humor with them to the grave.

"We Seceded Where Others Failed."