St Mary's Episcopal Cathedral

is best seen from below in Dean Village as you follow the walkway along the stream - from the top it's just a busy thoroughfare. Crossing in four arches 107 ft / 32 m above the stream, it was Telford's last major project. As well as improving the route to Fife, it made the north bank into prime real estate, so elegant terraces were built there.

Opposite side of Belford Rd has a slightly smaller collection, but enough to infuriate about one-in-five reviewers, who rage that their kids' drawings stuck on the fridge door are better. A neon sign in the garden reassures all and sundry that "There will be no miracles".

This townhouse was designed by Robert Adam, completed in 1796 and has been furnished in the style of its first owner John Lamont. Its last private owner the Marquess of Bute also acquired adjacent townhouses and along with the other owners got the entire north facade of the square restored to Adams' imposing original design. Visit by self-guided tour, and in mid-summer you need to book as it sells out.

The original modern art gallery, established in 1960, was in the Botanic Gardens. In 1895 it moved into this neoclassical building, originally a refuge for fatherless children, and in 1999 it expanded across the road into the neoclassical orphanage now known as Modern Two. The gardens of Modern One have been sculpted. Both buildings have extensive contemporary collections and most visitors find that seeing one of them is plenty for an afternoon.

An old red phone box has been kitted out with Edwardian memorabilia, and nicknamed for Sir Giles Gilbert Scott (1880-1960) designer of the box. You can look in the windows anytime, or collect the key for £3 (for Save the Children) from Stewart Christie and Co who run a long established gentleman's outfitter in the shop next to it.

Isaac Newton realised that what caused the apple to fall was the very same force moving the moon, planets and stars. James Clerk Maxwell (1831-1879) was born in this house, before the family moved to Kirkcudbright. He was intensely curious about how nature worked and made a "great unification" of equal importance to Newton's: that magnetism, electricity, light and heat are all manifestations of the same electromagnetic spectrum. And this spectrum must contain other frequencies beyond human sensing: hence X-rays and radio waves, and the entire science of telecommunications. He made possible Einstein's 20th century unification of gravity, mass and energy, and contributed to many other fields of enquiry. The Foundation has preserved this townhouse with his memorabilia. His statue stands at the east end of George St and a laboratory block is named for him on the Edinburgh University science campus.