This stunning concert hall has become a symbol of Iceland's national recovery.

An encyclopedic collection of mammal penises.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Along this wire fence, travelers have been leaving a particular memento since 2012.

Three columns of volcanic rock shoot out of the ocean.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This historic black and white monastery is one of Bulgaria's architectural jewels.

A striking symbol of the Bulgarian capital.

Sofia's legislative center is continuously reinventing itself.

"Holy Wisdom" overlooks the city that became its namesake.

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

A unique hotel for the artistic soul.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

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.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.