28 districts

Districts

The city has 28 districts. Downtown in the middle is Ethereum mainnet; the districts around it are the L2s and sidechains that run on top of it. Open a district to read who built it, what technology it uses and how it appears in the city.

L1 Downtown

Where every district posts its data and settles.

EthereumL1 · settlement & data availabilityThe capital. Every L2 eventually posts its data here (blobs) and settles here. A new block (slot) is produced every 12 seconds, and the lighthouse stands for the beacon chain (consensus).

Superchain · OP Stack

Chains built with Optimism’s OP Stack, gathered west of downtown.

BaseOptimistic rollupCoinbase’s Superchain L2 and the city with the most daily transactions — consumer apps, social and payments cluster here. It has no token of its own, so building height is computed from TVL.OP MainnetOptimistic rollupHome of the Superchain. The original L2 by Optimism, creator of the OP Stack; the blueprints for the other OP Stack towns came from here.UnichainOptimistic rollupA DeFi-focused L2 built by Uniswap, with 1-second blocks and verifiable block building.InkOptimistic rollupAn L2 run by the Kraken exchange, aiming to bring exchange liquidity on-chain.SoneiumOptimistic rollupSony’s entertainment and fandom L2.World ChainOptimistic rollupA “humans first” L2 built on World ID (iris verification). Proof of Human acts as the city pass.ModeOptimistic rollupA Superchain L2 oriented toward AI agents and DeFi.ZoraOptimistic rollupA media L2 centered on NFTs and creator coins.LiskOptimistic rollupAn L2 aimed at emerging markets (Africa, Southeast Asia) and real-world assets.CeloOptimium (external DA)A mobile payments and stablecoin town that migrated from its own L1 to an Ethereum L2 in 2025. 1-second blocks.FraxtalOptimium (external DA)The L2 of the Frax stablecoin ecosystem. Fees are paid in the FRAX token.MegaETHReal-time L2 (MegaEVM)Mainnet since February 2026. Chasing “real-time” performance with 10 ms mini-blocks; thousands of transactions per second are the goal, so its roads are full of trucks.BlastOptimistic rollup · winding downAn L2 that paid native yield on ETH and stablecoins. It announced its shutdown on 2 October 2026 and is winding down while users withdraw.MantleZK rollup (OP Succinct)Bybit-affiliated L2. It adopted zero-knowledge proofs (OP Succinct) in 2025 and, since April 2026, posts all its data to Ethereum blobs — a ZK rollup.

Arbitrum family

Chains built with Arbitrum technology, east of downtown.

Arbitrum OneOptimistic rollupThe L2 with the deepest DeFi liquidity. 0.25-second blocks and permissionless fraud proofs (Stage 1).Arbitrum NovaOptimistic rollupA low-cost chain for games and social apps. Once an AnyTrust chain whose data was held by a committee, it has posted everything to Ethereum blobs since the end of August 2026.Robinhood ChainOptimistic rollupMainnet since July 2026. Robinhood’s Orbit chain for tokenized stocks and real-world assets.

ZK rollups

Chains that settle with zero-knowledge proofs, plus a based rollup — north of downtown.

ZKsync EraZK rollupA ZK rollup that settles with zero-knowledge proofs — the hub of the Elastic Network of ZK chains.AbstractZK rollupA ZK chain built for consumer and gaming apps.StarknetZK rollup (STARK)A ZK rollup using the Cairo language and STARK proofs, with its own virtual machine rather than the EVM.ScrollZK rollup (zkEVM)A bytecode-compatible zkEVM rollup.LineaZK rollup (zkEVM)The zkEVM from Consensys, maker of MetaMask. The LINEA token launched in 2025.Polygon zkEVMZK rollup (zkEVM) · shut downPolygon’s zkEVM rollup. It was shut down on July 1, 2026, so this is now an empty district where no new blocks are produced.Taiko AlethiaBased rollupA “based rollup” whose block ordering is done directly by Ethereum validators.KatanaZK rollup (Agglayer)A DeFi-focused chain built by Polygon and GSR, connected to other chains through the Agglayer.

Sidechain satellite towns

Independent chains with their own validators, across the river to the south and linked only by bridges.

Polygon PoSSidechainA sidechain with its own validator set — a satellite town linked to Ethereum only by bridges.Gnosis ChainSidechainA sidechain that pays gas in xDAI. A town of payments and governance experiments.

Facts on this page are as of 2026-10 and may change. If you spot a mistake, please tell us through the contact page.