A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This sublime architectural marvel is a rare example of an expressionist church.

A ghost town at the airport is now a refuge for blue butterflies.

A castle that was built stone by stone by an eccentric journalist.

The legendary building that needed ghostly approval before being built.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Turnip-shaped island just off the Michigan shore in Lake Huron.

The birthplace of the Ford Model T is now a museum full of antique cars.

One of Detroit’s oldest blues clubs stands in defiance of the passage of time and the city’s shifting fortunes.

The collection of ceremonial and cultural objects spans many countries and hundreds of years.

Dilapidated Mayan-themed ballroom was one of Detroit's most popular venues through the 40s.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Millions of dollars worth of sculpture decorate this Iowa city center.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

A brick-paved former section of the historic coast-to-coast highway.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

This century-old roadside attraction is full of bizarre rock formations.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A hand-built folk art installation covered with messages of God's love.

This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.

The 30,000-volume library is one of the world's most impressive poetry collections.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

This wooded grove of beautiful hand-built stone grottos is a hidden gem within a shuttered Franciscan monastery.