Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

Ride a dragon train into a world of dwarves.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

A cheeky reminder about the value of art dangles above one of Olomouc's busiest streets.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

The gargoyles and grotesques of the 21st century are here—22 emoji built into a new building in the Netherlands.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

Largest lake in Great Britain measured by surface area.