Tiny memorials honor individual victims of the Holocaust.

Cold war icon and onetime "hole" in the iron curtain.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

A giant portrait of an ancient king looms over the river.

Moss and stone turn this waterfall into an otherworldly liquid veil.

Romania's triumphal arch looks out over Bucharest.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

This snug medieval lane is one of the narrowest streets in the world.

This scenic Icelandic lava flow is named for a pair of Berserkers who were murdered, according to a famous Saga.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The world's longest known cave system.

The largest earthwork effigy in the world.