This artistic temple brings together multiple architecture styles, but is only an example of one.

This military mausoleum captures the solemn grandeur that most memorials only aspire to.

The home of a neoclassical master is now a shrine to his chosen art style.

A museum dedicated to exhibiting remarkable outsider art.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

An enormous concrete structure built over a nuclear crater.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

This igloo-shaped landmark in Iqaluit serves as the seat of the Diocese of the Arctic.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

A castle perched precariously over the Crimean Sea.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

A monument marks the location of the first successful steamboat demonstration.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This monument to one of the largest science fiction games of all time bears the names of hundreds of thousands of players.

This small road tunnel is the only place where you can cross beneath the Erie Canal.

This amazingly preserved Gold Rush town is a historian's dream.

The only road through the heart of Glacier National Park.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

A smoke stack so large, the Washington Monument could fit inside!