A student driver's nightmare.

Hidden beneath the streets of London is a secret subway that only carried mail.

The remains of Crystal Palace Great Exhibition of 1851.

A unique seaside cave where Aleister Crowley faked his own death.

The stunning interior of this Gothic church is covered in ornate gold details.

This small chapel is built of human bones and decorated with a golden skeleton.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

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

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

A Jenga-style cylindrical tower of books that appears to go on forever.

Where the lovelorn find a home for their sentimental keepsakes.