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

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Double spiral staircases are not unheard of, but they are very rare.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This beautiful, historic church looks like something out of a simpler past.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This elaborate towering structure was once famed for its revolutionary height.

Two mermen, eternally spitting into each other's mouths.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

This Queens beer hall preserves a German culture and language that is all but lost.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

The most confusing clock in New York.

Salute the leader of the proletariat.

Why have you never heard of the second most popular tourist site in New York?

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Sniff the Titan Arum's rotting flesh.

A bit of retro transportation flair preserved in the world's largest department store.

An artist's cute bronze subway sculptures belie his violent artistic past.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.