17th century palace once a meeting place for politicians.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

This sculpture used famed boxer Joe Louis as the inspiration behind its body.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Locals believe this abandoned ruin on the outskirts of Bucharest is haunted.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Romania's triumphal arch looks out over Bucharest.

A Hungarian optometrist's charming collection of Asian art and curiosities.

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

Frequent fliers welcome in this airplane hotel.

A building so large that it has its own weather.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.

This memorial honors those who served on Gallops Island Radio Training Station during the second World War.

The infamous Boston Mob ran rackets from an office here in the 1970s.

"Mock all and sundry things, but leave the saints alone."

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A men’s restroom became a sandwich shop.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This historic Boston building has gone from personal estate to porn theater and back again.