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

Lie in a hammock where George Washington stood.

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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

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

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

Ruins of an old water tower that look like a horror-film castle.

A museum dedicated to the former country.

An idyllic traditional timber village on a picturesque hill was built for a film.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A pair of connected skyscrapers form this symbolic gateway.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.