The most confusing clock in New York.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

The former hotel where Tesla invented the radio.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

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

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

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

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.

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

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

The southernmost outpost of the Russian Empire in colonial America.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

In which a local geological marvel becomes a quaint roadside attraction.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

A remarkable cabinet of curiosities in an art space in the center of Berlin.

Tiny memorials honor individual victims of the Holocaust.