Join in a Seance at the Swedenborgian Church.

A whimsical, but often overlooked clock in Park Avenue.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

A semi-scholarly approach to sex.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A vibrant, 100-foot-tall mural dedicated to Evelyn Nesbit, the tragic icon of the Gilded Age.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

Nikola Tesla's former home contains an homage hidden from plain sight.

The former hotel where Tesla invented the radio.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

Elevated freight railway turned wildly successful urban park.

The first museum in the United States dedicated entirely to posters.

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

Graffiti-covered ruins that were once part of a farm owned by a mental hospital.

Walk through row upon row of manicured miniature trees at the United States' largest bonsai nursery.

One of the last Depression-era bandshells still standing was the site of Elvis Presley’s first live concert.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

This park offers a variety of sights and activities including trail rides and buffalo sightings.

The biggest drug trafficking passage between Mexico and the U.S.

Abandoned rock quarry now a haven for mountain bikers and hikers.