One of the few remaining temples of the Religion of Humanity.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

An ornate private entrance to the Vienna subway built specifically for the emperor.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

The solemn exterior conceals an opulent interior of this 17th century church.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

A silly medieval mural preserved on the side of a Viennese house.

Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

The topiary maze at the Habsburg hunting lodge.

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

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

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

A surreal statue honoring Prague's favorite literary son.

Steadily reminding Czechia of its past.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.