This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

The Underground Railroad passed right through this historic Brooklyn Heights church.

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

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

An arcade packed with a rotating collection of unique independent video games.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

Ride the subways of yesteryear.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

The tallest structure in Italy is a remote radio transmitter in Sicily.

This unique museum is home to over 5,000 puppets of all types.

A small museum filled with unique fossil finds, including one of the oldest specimens of ground sloths found in Colombia.

Colombia’s only monument erected to mark the end of slavery in the former Republic of New Granada.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A wall of this old hotel was decorated with drawings made of pebbles during its construction.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

Locals believe this abandoned ruin on the outskirts of Bucharest is haunted.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

A small shrine dedicated to a god of lightning and electronics.

This 400-year-old sweet shop serves a delicacy some have described as "edible incense."

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

The cutest shrine in Kyoto is dedicated to bunnies.