Dine amidst exotic plants at this former royal greenhouse.

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

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

This splendid tomb may look fantastic, but there's nothing in it...

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

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

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

A sculpture of a beloved local figure, who tipped his top hat to everyone he passed on the streets of Bratislava.

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

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

The largest fountain in Bratislava.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Fantastic stories on a miniature railroad.

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.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

This ancient Egyptian obelisk still bears the wounds of World War I.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The world's largest collection of ship figureheads includes figures from legends and history alike, from Sir Lancelot to Abraham Lincoln.