1.) 'zoom.earth' — Watch the world via live satellite imagery
2.) 'flightradar24.com' — See every plane currently in the sky
3.) 'marinetraffic.com' — Track all ships at sea in real time
4.) 'windy.com' — Live map of winds and storms
5.) 'lightningmaps.org' — Watch lightning strikes hitting Earth in real time
6.) 'earthquake.usgs.gov' — Live list of recent earthquakes
7.) 'submarinecablemap.com' — Ocean cables carrying the internet
8.) 'globalforestwatch.org' — Watch forests disappear from space
9.) 'worldometers.info' — The world's statistics, second by second
10.) 'internetlivestats.com' — Current number of tweets and searches being posted
11.) 'thetruesize.com' — Compare the true sizes of countries
12.) 'oldmapsonline.org' — Maps from centuries ago
13.) 'davidrumsey.com' — Archive of 150,000 historical maps
14.) 'openstreetmap.org' — World map drawn by volunteers
15.) 'window-swap.com' — Look out the window of a random person around the world
16.) 'virtualvacation.us' — Virtual walks through cities
17.) 'mapcrunch.com' — Teleport to a random spot on Earth
18.) 'atlasobscura.com' — Catalog of the world's strangest places
19.) 'neal.fun' — Interactive knowledge experiences
20.) 'htwins.net/scale2' — Scale journey from atom to universe
21.) 'eyes.nasa.gov' — Explore the solar system in 3D
22.) 'stellarium-web.org' — Real sky map in your browser
23.) 'apod.nasa.gov' — NASA's astronomy picture of the day
24.) 'images.nasa.gov' — NASA's entire visual archive, free
25.) 'pudding.cool' — Visual articles told through data
26.) 'ourworldindata.org' — The state of the world with real data
27.) 'gapminder.org' — What we mistakenly think we know about the world
28.) 'informationisbeautiful.net' — Visualizing complex data
29.) 'data.worldbank.org' — World Bank's open data
30.) 'data.tuik.gov.tr' — Turkey's official statistics database
31.) 'archive.org' — Archive of millions of books, films, and software
32.) 'gutenberg.org' — 70,000 free books whose copyrights have expired
33.) 'openlibrary.org' — Record of every book in the world
34.) 'loc.gov' — U.S. Library of Congress digital archive
35.) 'europeana.eu' — Europe's cultural heritage archive
36.) 'dp.la' — America's digital library collection
37.) 'artsandculture.google.com' — Tour museums from home
38.) 'rijksmuseum.nl' — Download artworks in high resolution
39.) 'wikiart.org' — Archive of 250,000 artworks
40.) 'publicdomainreview.org' — Forgotten visual treasures of history
41.) 'openculture.com' — Free archive of culture and education
42.) 'metmuseum.org' — Met Museum's open collection
43.) 'musicmap.info' — Family tree of music genres
44.) 'radiooooo.com' — Pick a country and decade to listen to that era
45.) 'listen.hatnote.com' — Turn Wikipedia edits into audio
46.) 'wikipedia.org/wiki/Special:R…' — Random knowledge well
47.) 'timeanddate.com' — Time, sunrises, and sky events
48.) 'sciencedaily.com' — Live stream of science news
49.) 'arxiv.org' — Free preprints of scientific papers
50.) 'observablehq.com' — Visualize data with live code