Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

This massive, ancient stone was disassembled and then put back together again.

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.

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

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

These ancient sacred grounds granted amnesty to those who managed to reach them.

This black shoreline is made up of exploded lava particles.

This seemingly cursed monument is dedicated to one of Canada's great war heroes.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

These locks on North America’s oldest canal are named after a porcine rock formation.

This inexpensive lodging house was once a prison notorious for its inhumane practices.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

This probably wasn't what Mao had in mind.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A small 12th-century temple surrounded by waters believed to have curative properties.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

A battle between nature and architecture in the Cambodian jungle.

Decorated by local artists, the city's utility boxes have become three-dimensional canvases.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.

The New Central Library is a masterpiece of contemporary architecture in the midst of downtown Calgary.