The oldest living tree in Manhattan comes shrouded in sinister legend.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

The site of the deadly Triangle Shirtwaist Factory Fire.

One of only two commuter aerial tramways in the United States.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A hidden architectural treasure in New York's Brooklyn.

Sniff the Titan Arum's rotting flesh.

One of only two remaining Victorian-era greenhouses in New York.

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

A celebration of capitalism in Midtown.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Ride the subways of yesteryear.

Read a book next to a Midtown waterfall.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

Ancient artists in the middle of nowhere.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

Three vintage horses survived a 1976 inferno and found a home on a sister carousel.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

Welded sphere dropped from space.

Remote, volcanic island that Darwin, Hooker, and the Royal Navy shaped into a thriving, artificial ecosystem.