This Orthodox Church's exterior is rather unorthodox.

The main gates have been locked since 1745 and will remain so until the Stuart Dynasty returns to the throne.

This was once a hall in which a 16th-century royal banquet was hosted by King James VI of Scotland.

An officers prison camp believed to be impregnable by the Germans saw over 30 successful escapes.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

The centuries-old obelisk may have inspired J. R. R. Tolkien.

The largest of Denmark's seven mysterious round churches stands on an island in the Baltic Sea.

A temple made famous by Japanese Buddhist monks who sacrificed themselves at sea.

Spend the night in this formerly abandoned traditional Scottish village.

A hidden three-foot-wide house separates these two regal churches.

This sprawling bookstore spans four floors and has more than a million books in stock.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A technicolor place of worship for Elevationists.

The crypts are so large they're basically their own underground church.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

One of downtown Berlin's last reminders of its Communist past.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

Georgetown’s most impressive building is also one of the tallest wooden churches in the world.