Elevated freight railway turned wildly successful urban park.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Make a tough dinner decision: Octopus wasabi roulette or bull penis?

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Avoid gangster interaction while window-shopping.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Sniff the Titan Arum's rotting flesh.

The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.

This former sugarcane transport tunnel is now a portal to a lovely beach.

Puerto Rico's once thriving oil company is now an abandoned wonderland of rusty steel.

This community-driven organization uses education and eco-friendly technology to protect the environment.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

The crumbling remnants of this 19th-century quarantine hospital hint at the touristy island's darker past.

Invading U.S. troops were first seen from this now-abandoned tower, leading to the Spanish-American War.

This tiny home was originally a narrow alleyway.

Legend has it this historic port was a popular hideout and smuggling spot for pirates.

This nearly abandoned "company town" is a ghost of Puerto Rico's once-lucrative sugar industry.

This former railroad bridge was named after the great river that once flowed below it.

Years of neglect and nature took a toll on this 19th-century lighthouse.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

These red and black houses were awarded to the firefighters who saved their city from an enormous blaze.

The world's second largest single-dish radio telescope, once used to contact E.T.