The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The magic's in the hole!

A historic freight system that found the true gold rush is in tourism.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

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

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

Europe’s oldest natural human mummy.

Op-art architecture designed for happiness.

Baroque celebration of the end of the Great Plague of Vienna.

The beautiful baroque library of the Hapsburg empire.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

The prototype for all Nazi concentration camps.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A bizarre house filled with an astounding array of collections.

One street divides a single town that stands in two U.S. states.