What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

Internationally known record store and purveyor of "dusties."

All of Chicago's wood-paved streets are long gone but two alleys remain.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A science teacher's dream.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

An enormous park-like oasis, full of famous Chicagoans' graves.

A Bibliophile's Dream.

A lush green oasis in the middle of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Time stands still at this serene burial ground in the center of Budapest.

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

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Budapest's Communist-era statues, banished to the suburbs.