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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A semi-scholarly approach to sex.

Try not to get slimed in Tribeca.

A crumbling hospital from the 1850s on Roosevelt Island.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

The taxidermy remains of the most popular pony in children's literature.

Extraordinary objects lurk in this quintessential regional museum.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

At 207 feet, one of the world's longest continuous escalators.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

One street divides a single town that stands in two U.S. states.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This now abandoned restaurant provides some of the most amazing views of Lisboa.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

The television series' iconic giant foot was borrowed from this classical painting.